重点讲解：
1. give out
公开，宣布（消息等）；
eg. How often do you give your phone number out?
你经常把自己的电话告诉别人吗？
eg. He wouldn't give out any information.
他不愿透露任何消息+9)i;Guj6&Tw|q。
2. pay back
偿还；回报；
eg. I am indebted to my friends and families and wish I could pay them back.
我深深的感谢我的朋友和家人并希望能够回报他们|H^LWZ6lr0ojsL[zy,+。
eg. I've no idea how I can pay you back for all your help.
我不知道怎样才能报答你对我所有的帮助X;X2&N7C1z。
3. melt down
熔化，熔毁（以再利用）；
eg. Some thieves do not even bother to melt down stolen silver for its scrap value.
有的小偷懒得为了一点蝇头小利去费劲把偷来的银器熔掉*qplPM%E2rxN。
eg. This programme investigates the rate and extent of the melt down in some of the remotest regions on Earth from Alaska to Antarctica.
本节目前往地球最偏远的地方，从阿拉斯加到南极洲，探索冰河融化的速度和范围&mHXY.Eh^[7JZsx3p*eL。