重要詞組

by nature: 生性、本能
on the lookout for: 尋找、注意
intruder: 侵入者、闖入者
force one’s way into: 強行闖入
invite in: 請…入內、邀請

語義表達：侵入者；闖入者An intruder is a person who goes into a place where they are not supposed to be.
句型操練：It took a week to winkle out the intruder.
足足花了一個星期才將入侵者逐出。
When sensors detect an intruder, the barrel pivots to follow him.
一旦發現入侵者，機槍就旋轉槍管跟蹤目標。
句型出處：People by their very nature are always on the lookout for intruders….
人本能的都在尋找入侵者…

語義表達：防止；預防；阻止To prevent something means to ensure that it does not happen.
句型操練：Further treatment will prevent cancer from developing...
進一步的治療將阻止癌癥惡化。
We recognized the possibility and took steps to prevent it happening.
我們認識到了這種可能性，并且采取了一些預防措施。
句型出處：Trying to prevent those on the outside from getting in.
阻止別人從外面闖入。