bag of tricks 比喻能届时解决紧急问题而又暂时保密的好办法

The total skills， knowledge， and often secret abilities that a person has .

EXAMPLE:

To be a successful in todays competitive business environment， an executive has to use everything in his bag of tricks.

blow off steam 发脾气

to release frustrationoranger that has been building up; also to celebrateordo something in a loudornoisy way

EXAMPLE:

After a week of negotiations with the union， the workers decided to have a party and blow off steam.

blue chip 蓝筹股， 稳当可靠的财产

a type of stock highly valuesd for its long record of steadyorlong term earnings; also a valuable property

EXAMPLE:

The investor bought 100 shares of stock in a blue chip company.

bone of contention 争论的焦点

a disagreement， dispute，orargument about something; a strong difference of opinion; a conflict

EXAMPLE:

A bone of contention was the division of powers between the national and provincial governments.