It was surprising when the alkali spectra showed unmistakable doublets.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.The envelope is called a double of doublets.这种峰叫做双合双重线....
Accompanying the peripatetic Secretary of State on his shuttle diplomacy marathons.伴随四处奔走的国务卿于穿梭外交的马拉松旅途上....a hectic, peripatetic life full of people and parties.整天疲于周旋、忙于应酬的紧张生活Her father was in the army and the family...
对于两个七十几岁的人来说，这段路太远了。It's a long way to go for two people in their seventies.这厅最多能容纳七十人.This hall holds a maximum of seventy people.他看起来不到七十岁.He looked younger than his 70 summers....