1、set off
动身;出发;启程
Nichols set off for his remote farmhouse in Connecticut.
尼科尔斯动身去他在康涅狄格州的偏僻农舍了。
The President's envoy set off on another diplomatic trip.
总统的使节开始了又一次外交之旅。
引爆(炸弹);触发，拉响(警报等)
Any escape, once it's detected, sets off the alarm.
一旦发现有泄漏，警报就会响起来。
Someone set off a fire extinguisher.
有人打开了灭火器。
引发;触发;激起
The arrival of the charity van set off a minor riot as villagers scrambled for a share of the aid.
救济物资车的到来引发了小小的骚乱,村民们争先恐后地想抢到一份援助物资。
If he attended a party without his wife, it set off a storm of speculation.
如果他没和妻子一块儿出席宴会，便会招致各种猜测满天飞。
2、promotion
晋升；升职；提升；擢升
Consider changing jobs or trying for promotion.
考虑换个工作或者争取升职。
rewarding outstanding employees with promotions to higher-paid posts.
将出色的员工提升到薪水更高的职位作为奖励
（尤指通过广告进行的）促销，推广，推销
During 1984, Remington spent a lot of money on advertising and promotion.
1984年，雷明顿公司在广告和促销方面花费了大量的资金。
Ask about special promotions and weekend deals too.
也问一问特别促销和周末特价的情况。