睿笔智育 WisdomScript Edu单元二：人类 Human2.1 人类的繁殖 Human Reproduction1. (a) 男性生殖器官 Male Reproductive System (b) 女性生殖器官 Female Reproductive System 2. 人类受精过程 Human Fertilization Process✓ 精子是男性的生殖细胞，卵子是女性的生殖细胞。Sperm are the male reproductive cells, and ova (eggs) are the female reproductive cells.✓ 受精：一个精子和一个卵子结合的过程。Fertilisation: The fusion of a sperm from a male parent and an ovum from a female parent.
睿笔智育 WisdomScript Edu(a) 精子被输入阴道后，会沿着子宫和输卵管游向卵子。The penis of a male parent transfers sperms into the vagina of a female parent. Sperms swim towards the ovum using their tails.(b) 一个精子和一个卵子结合，形成受精卵——受精。Only one sperm will fuse with an ovum. The fusion is known as fertilizations. This takes place in the Fallopian tube.(c) 受精卵沿着输卵管向子宫移动，同时进行多次的细胞分裂，逐渐发育。The ovum that has been fertilised by a sperm is known as a zygote.(d) 受精卵进入子宫后，附在子宫壁上——着床。The fertilized egg enters the uterus and attaches to the uterine wall—implantation.(e) 受精卵着床后继续发育成胚胎。A zygote develops to form an embryo.(f) 胚胎继续成长发育成胎儿。An embryo develops in the uterus of the mother to form a foetus.
睿笔智育 WisdomScript Edu✓ 胎儿通过脐带与母体相连。脐带从母亲的血液中摄取氧气和营养素。同时，胎儿也借着脐带把自己产生的废物和二氧化碳通过胎盘渗入母亲的血液中，由母亲排出体外。A developing foetus is connected to the mother through the umbilical cord. It provides nutrients and oxygen from the mother to the foetus. The umbilical cord also removes waste products from the foetus.3. 人类从受精至婴儿出生的过程The Process of Human Fertilisation Until Birth
睿笔智育 WisdomScript Edu单元三：微生物 Microorganisms3.2 微生物的生命过程 Life Processes of Microorganisms（微生物会怎样？）1. 微生物会呼吸 Microorganism can breathe面粉 + 糖 + 酵母菌Flour + sugar + yeast备注：糖是酵母菌的养分。Note: The sugar is the nutrient of the yeast.观察： 面团膨胀了。Observation: The flour expand.推断： 酵jiào母菌呼吸时，会释放许多二氧化碳。Inference: Yeast produce carbon dioxide during breathing.2. 微生物会移动Microorganism can move 观察： 草履虫从一个地方移动至另一个地方。Observation: The paramecium moves from one place to another.推断： 草履虫依靠身上纤毛的摆动，在水中移动以寻找食物。Inference: The paramecium relies on the beating of the cilia on its body to move in the water and search for food.
睿笔智育 WisdomScript Edu3. 微生物会生长和繁殖 Microorganism can growth and reproduce 观察： 一个星期后，面包上长出黑色斑点。Observation: black spots grew on the bread after one week. 推断： 霉菌的体积、高度和数量会快速和大量地增加。Inference: The volume, height, and number of mold will increase rapidly and significantly.3.3 影响微生物生长的条件 Factors Affecting the Growth of Microorganisms（微生物在怎样的情况下会成长和繁殖？）1.水 Water A 组 Set A B 组 Set B 观察： 五天后，面包没有黑色斑点。观察： 五天后，面包有大量黑色斑点。Observation: The bread had no black spotsObservation: The bread had black spots after five days.
睿笔智育 WisdomScript Eduafter five days. 观察： 五天后，B 组面包的黑色斑点比较多。Observation: The bread in set B had more black spotsafter 5 days. 推断： B 组的微生物获得水。水微生物生长的条件。Inference: The microorganisms in set B obtained water. Water is factors affecting the growth of microorganisms. 2.空气 Air观察： 五天后，面包没有发霉。Observation: The bread did not turn mouldy after five days. 推断： 保鲜袋里没有空气，微生物得不到空气。空气是微生物生长的条件。Inference: There is no air in the zipper bag, so the microorganisms cannot get air. Air is factors affecting the growth of microorganisms. 3.养分 Nutrient
睿笔智育 WisdomScript EduA 组 / Set A B 组 / Set B 水 + 酵母菌water + yeast水 + 糖 + 酵母菌water + sugar + yeast备注：白糖是酵母菌的养分。Note: The sugar is the nutrient of the yeast.观察： 30 分钟后，B 组的气球膨胀得比 A 组的大。Observation: The balloon in Set B expands larger thanthe balloon in Set A after 30 minutes.推断： B 组的酵母菌获得糖分作为养分。酵母菌获得养分，会释放许多二氧化碳，导致气球膨胀得更大。养分是微生物生长的条件。Inference: The yeast in Set B obtained sugar as nutrients.When the yeast obtains nutrients, it releases a large amount of carbon dioxide,causing the balloon to expand bigger.Nutrient is factors affecting the growth of microorganisms. 4.适当的酸度 Suitable Acidity用醋腌渍黄瓜观察： 15 天后，黄瓜没有变质，可以食用。Observation: The cucumbers had not spoiled and were edible after 15 days. 推断： 微生物在酸性环境下生长得较缓慢。适当的酸度是微生物生长的条件。
睿笔智育 WisdomScript EduInference: The acidic environment slows the growth of microorganisms. Suitable acidity is factors affecting the growth of microorganisms. 5.适当的温度 Suitable temperature 观察： 15 天后，冰箱里的食物没有变质，可以食用。Observation: The food in the refrigerator had not spoiled and was edible after 15 days. 推断： 微生物在温度低的环境下会缓慢生长。适当的温度是微生物生长的条件。Inference: The lower temperature in the refrigerator slows the growth of microorganisms. Suitable temperature is factors affecting the growth of microorganisms.