每日商务英语 第449期:妥善保管 本文已影响 2.98W人 under lock and key 妥善保管ing-bottom: 100%;">英文释义In a well-protected, very safe place.例句 The famous chef keeps his best recipes under lock and key so no one will steal them.这位名厨妥善保管着他的最佳菜谱,没有人能偷走。