碱金属原子的价原子具有两种能态.The valence atom of an alkali - metal atom has two states.所有的碱金属都在闭合壳层之外有一单个S电子.All the alkali metals have a single s - electron outside a closed shell.当碱金属光谱显示出不容怀疑的双线结构时,是令人惊奇的.It was surprising when th...
I've known him since he was knee - high to a grasshopper.他很小的时候我就认识他了.Charles started reading when he was knee - high to a grasshopper.查尔斯在很小的时候就开始读书了.He thought he had made an end of the little grasshopper.他以为把那个小蚱...
She is very good at using her charm to get her way.她非常善于利用自己的魅力随心所欲。I bet you were good at games when you were at school.我敢说你上学时体育很棒。He's good at ad-libbing his way out of trouble.他善于为自己妙语解围。...