他们不得已买了顶层楼座的廉价票。They had been forced to find cheap tickets in the gallery.不得已迁移至另一城市工作forced relocation to a job in another city实在不得已,她只好请几天假.She had no alternative but to ask for a few days'leave....
It is still in an embryonic stage.它还处于萌芽阶段.Embryonic development seems to be controlled principally by a very small number of master genes.胚胎发育似乎主要受制于少数主导基因。The neural tube then might induce the formation of still other ...