They tend to operate on a hair trigger so they can profit from breaking news before other investors act and wipe out their advantage.

他们常常一触即发以至于能在其他的投资人行动，丧失优势前从爆炸新闻中盈利。

Investors fall into a special category as news consumers; they tend to operate on a hair trigger so they can profit from breaking news before other investors act and wipe out their advantage.

作为新闻的消费者，投资人是一个特殊的类别。他们常常一触即发以至于能在其他的投资人行动，丧失优势前从爆炸新闻中盈利。

A hair-trigger situation has been created which could lead to an outbreak of war at any time.

局势风云突变，战争一触即发。

In the future, scientists could use drugs to 'turn on' genes, which could trigger hair growth.

未来科学家可以用药物来“激发”基因，这样就可以刺激毛发的生长了。