He kept us at it all day.
他让我们不停地干了一天。
For reasons of security the door is always kept locked.
为了保证安全，门总是锁着的。
Dogs must be kept on a lead in the park.
狗在公园里必须系着牵狗带。
The bills kept coming in, one after another.
账单纷至沓来。
Next year's collection is still being kept under wraps.
明年的时装系列仍在保密之中。