You don't need braces if you're wearing a belt!要系腰带,就用不着吊带了.The table is shaky because the braces are loose.这张桌子摇摇晃晃,因为支架全松了.I'd rather wear braces, only the elastic perishes.我倒宁愿系吊裤带, 只不过因为橡皮筋坏得太快.He wore...
No one knows why a fetus is not automatically rejected by the mother’s immune system.没有人知道为什么母亲的免疫系统不会自动排斥胎儿。Modern medical technology like type-B ultrasonic checks can reveal the fetus gender.现在的医疗仪器例如B超是可以分辨出胎儿的性别的。Gro...