Apart from selenium and vapour - deposited germanium and silicon, glasses are at least diatomic.除了硒和汽相沉积的锗和硅之外, 玻璃至少是二原子的.Any heteronuclear diatomic molecule must have a dipole moment since its two ends are different.任何异...
把这件事告诉牛蛙 、 猎鸡鹰和斑鸠.Tell that to the bullfrog, chicken hawk or turtledove.一只斑鸠在电线上咕咕啼.One mourning dove coos up the power line.一只斑鸠呀, 飞过我们的花园,飞呀飞, 张着翅膀儿,颜色儿这么美呀美.Oh , a turtle - dove through our garden flew, spreading wide...