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....

at the latest的音标：at the latest的英式发音音标为：[æt ðə 'leitist]at the latest的美式发音音标为：[æt ði 'letɪst]...

最晚，至迟...