| 释义 |
Once an egg is fertilized by the sperm, it becomes an embryo.卵子受精后即成胚胎。Two right angles make a straight angle, which is a straight line.两个直角构成一个平角，即成一条直线。The small bridge on the painting was no more than a few strokes of a pencil.画中的小桥只用铅笔寥寥涂几笔即成。 |