重点讲解：
1. when it comes to 谈到；涉及；
例句：Shelly can hold her own when it comes to bicycling.
一涉及到骑自行车，谢利就不会败给别人7K|gUMAEfwNTMx-l2U;Y。
2. step up to the plate 开始行动；
例句：Every time you keep quiet and refuse to step up to the plate, you have one less chance to prove yourself.
每当你保持低调,不肯出面采取行动的时候，你就少了一次证明自己的机会m]GxwIz9mwf*twH=*2。
3. prop up 支撑；维持；
例句：Intelligence and wisdom is the lever propping up the society.
聪明才智是支撑社会的杠杆jO^&3Z94z6@。
4. turn around (使)复苏；(使)好转；
例句：’m sure our housing sale will turn around next month.
我相信我们的住房销售下个月肯定会好转sUZZ7offLMvy。