中美贸易紧张局势加剧

2. launch vt. 发动(战争等);开展(斗争等);发出(命令等);提出(抗议等)
例句：The miners launched a strike.
矿工发动了一场罢工。

3. complain v. 抱怨,发牢骚;诉说
例句：He complained that the exam was too hard.
他抱怨考试太难了。

4. infringe v. 侵犯(某人的权利)
例句：Their legal rights were being infringed.
他们的合法权利正受到侵犯。

5. accusation n. 指责；指控；控告
例句：She knew that no one would believe her accusation.
她知道没人会相信她的指控。

6. patent n. 专利, 专利权
例句：The patent runs out in three years' time.
这项专利期限为三年。

7. dispute n. 争论;争执;争端
例句：The dispute was settled last week.
争端在上周解决了。

8. appreciate v. (使)增值, 涨价
例句：Things appreciate as time goes on.
货物价格逐日上涨。

9. hurdle n. 障碍； 困难；难关
例句：In starting a new company, many hurdles must be crossed.
刚开办一个公司时, 必须克服许多障碍。

10. exacerbate vt.使恶化;使加重
例句：The drugs they gave her only exacerbated the pain.
他们给她吃的药只是加重了她的痛楚。