clear up: 澄清，解釋；使明白；消除（誤會、疑慮等）
The police hope to clear the matter up quickly．
警察希望迅速查清這件事情
The scientists have been trying to clear up the mystery．
科學家們一直試圖揭開這個謎。

good point: 令人信服的觀點
This is a very good point.
這是一個非常好的點。

put a stop to: 制止、使停止
It is time to put a stop to the violence.
現在是結束這場暴力活動的時候了。

prefer to: 寧愿
We prefer to stay where we are.
我們寧愿保持著現在的樣子。

get involved: 參與
This often gets worse when specialists get involved.
尤其是當專業公司介入時，這便更糟了。
And when local people get involved in these projects they also cost less to produce.
而由于當地民眾都參與這些項目，這些項目的成本也降低了。