(informal)ensure that all details are correct
(非正式)一絲不茍，重視細(xì)節(jié)
(informal)exactly on time
(非正式)準(zhǔn)時(shí)地
he arrived on the dot at nine o'clock.
他準(zhǔn)時(shí)在九點(diǎn)整到達(dá)。
(Brit. informal)a very long time ago
(英，非正式)很久以前
that wallpaper has been there since the year dot.
墻紙是很久以前貼的。
Exactly at the appointed time; punctual or punctually
準(zhǔn)時(shí)：正好在指定時(shí)間的；準(zhǔn)時(shí)的或準(zhǔn)時(shí)地
arrived at nine o'clock on the dot.
于九點(diǎn)準(zhǔn)時(shí)到達(dá)