重點講解：
1. engage in 參與；從事；
例句：You can engage in croquet on the south lawn.
你可以參加南邊草坪上的槌球游戲NShn~.DU=qWB!^3。
2. put sth. to the test 使經受檢驗；對…進行試驗；
例句：Arriving at the railway station, I put local knowledge to the test and ask a taxi driver.
到了火車站，為了檢驗自己對當地的了解程度，我請教了一個出租車司機!iOU--Z9k=|Mam-javu。
3. interact with 相互交流；相互溝通；
例句：Partners must interact with each other's ideas.
合作伙伴必須相互交流想法)6HsLxo5bn,。
4. serve as 用作；可當…使用；充作；
例句：She ushered me into the front room, which served as her office.
她把我領進了她用作辦公室的前廳73pVtR3SCnI(。