A symmetrical body rotating about an axis, one point of which is fixed, is called a top . 形狀對稱的一物體繞其軸轉(zhuǎn)動(dòng),若軸上一點(diǎn)固定不動(dòng),則這個(gè)物體就叫做陀螺。
One thing that makes men and women attractive to each other is having a 3 ) symmetrical body 男女互相吸引的因素之一,就是擁有勻稱的身材。