1.turn back 往回走；翻起，折转；扭转

The team were forced to turn back after an avalanche killed seven sherpas who were helping carry equipment.
在雪崩造成搬运设备的7名夏尔巴人死亡以后，探险队被迫折回。

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.
欧洲委员会为了扭转局面，对各个银行仅有一个简单的要求，即缩小资产负债表，但银行具体怎样做就不在它的关注之列了。

2.visible sign 明显的迹象

Perhaps the most visible sign of the explosion of private wealth in china tries hard not to be visible at all-the private bodyguard.
在中国，私人财富暴增最明显的迹象大概正是富人试图努力不让人察觉的私人保镖。

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.
联合国气候变化事务最高官员克里斯蒂娜菲格雷斯（christiana figueres）与解振华一起为“中国角”启动仪式剪彩，庆贺这一中国战略转变的明显迹象。

3.lead to 通向；导致

That can lead to serious consequences.
这会导致严重的后果。

All these ideologies lead to repression.
所有这些思想最终都导致镇压。

4.difficult to 难以

Such shutdowns will be increasingly difficult to enforce.
这样的封锁会越来越难以实行。

That might be difficult to hear.like what?
可能听起来很难让人接受比如说?