顾客威胁要用刀攻击主管。

A customer threaten to attack a supervisor with a knife.

一位顾客威胁着要用刀攻击主管。

A customer threatening to attack a supervisor with a knife.

它们还藏匿着数十种威胁人类和家畜的疾病。

They also harbor dozens of diseases that threaten both humans and farm animals.

思考威胁性想法的最佳场所是在没有威胁性的环境中。

And the best place to ponder a threatening idea is in a non-threatening environment.

一位顾客威胁要持刀袭击一名主管。

A customer threatened to attack a supervisor with a knife.