重點講解：
1. free time
空閑時間；
eg. He has a lot of free time he spends most of it in the garden.
他空閑時間很多——大都消磨在花園里了g,%aUrpTqWLOx。
eg. People who use their free time well are usually healthy and happy.
善于利用空閑時間的人通常健康又快樂JcqccazVXb!U=QR|=*-Z。
2. a bunch of
一伙，一群（人）；
eg. I shouldn't employ them — they're just a bunch of amateurs.
我不該雇用他們——簡直是一群外行O7mox.)2w*LJeYWoex2p。
eg. Your friends are all just a bunch of nobodies.
你的朋友都不過是無名之輩Wl^th~hcGe!N。
3. once in a lifetime
千載難逢；一生一次；一生難得；
eg. It's definitely a once in a lifetime experience.
這絕對是一次畢生難忘的體驗62A=4*#Ow,t9nH。
eg. "Participating in a race at the Olympics was a once-in-a-lifetime experience, " she said.
她說：“能參加奧運會比賽是人生中難得的經歷o*W29HvpoMC^!jy。”