1.turn back 往回走；翻起，折轉；扭轉

The team were forced to turn back after an avalanche killed seven sherpas who were helping carry equipment.
在雪崩造成搬運設備的7名夏爾巴人死亡以后，探險隊被迫折回。

In trying to turn back the clock the european commission has been guided by a simple demand that banks shrink their balance-sheets, without worrying about how they do it.
歐洲委員會為了扭轉局面，對各個銀行僅有一個簡單的要求，即縮小資產負債表，但銀行具體怎樣做就不在它的關注之列了。

2.visible sign 明顯的跡象

Perhaps the most visible sign of the explosion of private wealth in china tries hard not to be visible at all-the private bodyguard.
在中國，私人財富暴增最明顯的跡象大概正是富人試圖努力不讓人察覺的私人保鏢。

Christiana figueres, the un's top climate official, cut a red ribbon with mr xie to celebrate the most visible sign of a notable change of strategy.
聯合國氣候變化事務最高官員克里斯蒂娜菲格雷斯（christiana figueres）與解振華一起為“中國角”啟動儀式剪彩，慶賀這一中國戰略轉變的明顯跡象。

3.lead to 通向；導致

That can lead to serious consequences.
這會導致嚴重的后果。

All these ideologies lead to repression.
所有這些思想最終都導致鎮壓。

4.difficult to 難以

Such shutdowns will be increasingly difficult to enforce.
這樣的封鎖會越來越難以實行。

That might be difficult to hear.like what?
可能聽起來很難讓人接受比如說?