1.political system 政治體系

例句：The Chinese political system has evolved over a long period of time.

中國的政治制度是長期發展形成的。

2.self-interested 利己主義的

例句：Even a self-interested army stands to gain more from a society that is more productive.

即便出于自私的軍方立場來看，從一個更加多產的社會中，他們也會收獲更多。

3.expect to 期待去做

例句：It doesn't work so well when we're not particularly motivated to achieve our goal or don't expect to do well.

當我們不是特別關注我們實現的目標或者不期望做得更好時，蔡加尼克效應將會失效。

4.come together 集合

例句：We have to come together, worldwide, and "think".

我們——全世界——必須聯合起來共同思考。