1. the margin of 以……的差额（优势）
The election was won by the very narrow margin of only 15 votes.
此次选举，他们以仅仅15票的微弱优势获胜3.Sy2TPSAxa+;r_(t。

2. pledge to do sth. 承诺；保证
China has pledged to move much further than seemed imaginable even a year ago to rein in its emissions.
中国已承诺明显加大减排力度，其力度之大，在一年前简直无法想象[XGa86nGTwPu。

3. join forces with 加入；联手
Wen Jiabao said that China would join forces with Denmark in boosting cooperation between the two countries in all fields.
温家宝表示，中方愿与丹方一道努力，进一步推进两国在各领域的合作%2Ub1tk]#GXH@Z6W。

4. vulnerability to 容易……
"There is considerable evidence that vulnerability to depression is greatest in mid-life for women, " she said.
“有相当的证据表明妇女在中年时最易患上忧郁症，”她说]tQI+5LTFS%Hi)w_gr0。