例句:He said his sudden focus on foreign policy was not motivated by presidential politics.
他说他突然关注外交政策并非受总统政治的驱使。
2.step up 提高；增加
例句:The meeting ended with a pledge to step up cooperation between the six states of the region.
会议以承诺加快这一地区六国间的合作而结束。
3.trade deal 贸易协议
例句:They have been negotiating a bilateral trade deal.
他们一直在商谈一项双边贸易协定。
4.So far 到目前为止
例句:What have you found so far?
你到目前为止发现了什么？
