1.prime minister 首相，总理

Did you listen in to the Prime Minister yesterday evening?
你昨晚收听首相的广播讲话了吗?

He met with the Prime Minister of Japan for an hour and a half.
他和日本首相会晤了一个半小时。
2.pledge to 保证

He would keep his pledge to the utmost of his power.
他将极力信守他的誓言。

In the Second Training we pledge to practice generosity and not support social injustice and oppression.
在第二项训练中，我们保证，实践宽宏大量，不支持社会不公正和压迫。

3.build up 增进，加强

My neighbourhood has really been built up.
我的周围一带确实盖满了房子。

The area has been built up since I moved.
自我搬家以来这个地区就不断地盖起了新房。