我及时赶上了飞往伦敦的航班。I arrived just in time for my flight to London.你可真及时。嚯，真是好险呢！You were just in time. Whew! What a close call.他刚要发火，不过又及时克制住了。He was about to lose his temper but checked himself in time....
在某事中起重要作用to play a major role in sth它们还在从起重机上掉落的地方，一部分露出水面。They lay where they had fallen from the crane, sticking out of the water.办好一所学校,校长起重要作用.The headmaster plays an important role in the good running of a school....