lag behindfail to catch up with 落后 * The rest of the family had nearly reached the bank, but Jane was lagging behind. 家里其他人都快要游到岸边，只有简落在后面。lag behind落在后面;落后：Mary often lagged behind her friends when they went to the park，they had to wait for her. 玛丽跟她的朋友们一块去公园，她总落在她的朋友们的后面;他们不得不等着她。 |