时代

from generation to generation世代相传

Ice Age冰川期,冰河时代

keep up with the times跟上时代

过时

behind the time/times落伍,过时

out of date过时

及时,准时

in due time & in time及时地,在适当的时候

in season当令,应季;及时

on schedule按照预定时间,准时

on the dot准时;正点

on time按时,准时

right ontime及时,准时

时常,偶尔

at intervals

1.到处

2.时常;每隔...时间

at times有时,不时

every once in a while偶尔

every now and then有时;时时

every so often偶尔,有时

from time to time时常,有时

more often than not通常;时常

now and then时而,不时

off and on & on and off断断续续地,不时地

on occasion间或,有时

once in a while & every once in a while偶尔

随时

be at one's service随时提供服务,随时效劳

同时

at the same time

1.同时

2.然而,不过

coincide with (在空间、时间方面)巧合;同时发生;与...一致

in the meantime在...期间;同时