重點講解:
1. take part in 參加;參與;
He took part in the organization of a trade union.
他參加了工會的組織工作。
2. sign up for (和…)簽約;雇用;報名(參加課程);
She's decided to si gn up for music school.
她已決定報名上音樂學校。
3. due to 由于;因為;
The train had stopped due to a mechanical problem.
火車因為機械故障停了下來。
4. roll out 推出;
Once approved, the company will roll out a next-day delivery service and second and third-day delivery products.
一旦獲批,該公司將推出次日送達服務(wù)以及第二日和第三日送達產(chǎn)品。
n. 媒體,方法,媒介
adj. 適中的,中等