be sure to do sth.:一定要做，务必要.. 一定要随身带好物品（在这里签字，阅读说明，不要 越线，不要迟到) Be sure to take your things with you Be sure to sign your name here. Be sure to read these instruction. Be sure not to jump the line. Be sure not to be lat姻. 1515 be sure to do sth.: 一定要做，务必要… 一定要随身带好物品（在这里签字，阅读说明，不要 越线，不要迟到）。 Be sure to take your things with you . Be sure to sign your name here. Be sure to read these instruction . Be sure not to jump the line. Be sure not to be late