She should be back by ten o'clock at the latest.她最晚应该在10点前回来。Please be here by eight o'clock at the latest.请最晚在九点之前到这里.This railway will be opened to traffic in May at the latest.这条铁路至迟五月通车....
Ambient concentrations varied considerably by season.环境浓度随季节而大幅度变化.Another ambient temperature sensor is the vapor - filled bellows.另一种空气温度传感器是充气波纹管.Ambient noise may come from any direction.外界噪声可以来自任意方向....