1、be instrumental in在…方面起重要作用;
Nokia Siemens said the sale would be instrumental in helping it improve its position in the United States and Japan, as well as bolster diminishing profits.
諾基亞—西門子說,交易將有助于提升它們在美國和日本市場中的位置,也會支撐它們正在逐漸減少的利潤 。
2、fight against與…作斗爭;
"China is a vital ally in the fight against global warming, " he said.
他說:“在對抗全球變暖的斗爭中,中國是一個重要的盟友 。”