重點講解：
1. keep track of 跟上…的進展；掌握…的最新消息；
Bank statements help you keep track of where your money is going.
銀行賬單有助于你了解你的資金使用情況!PTg]~y*zm[tm2F4u0t。
2. at least （表示更正或改變自己剛說過的話）至少，起碼；
Success was assured and, at least to start with, the system operated smoothly.
成功有保證了，至少該系統一開始運行得挺順利yUgEBGyo=B7Kh[UxH。
3. be likely to do sth. 可能（做…）的；有（…）傾向的；
Tickets are likely to be expensive.
入場券可能很貴@M|zdx0~N73wlwhBdRc。
4. protect sb. from doing sth. 保護；防護；
The most important trees were tagged to protect them from being damaged by construction machinery.
最珍貴的樹木都被貼上了標簽，以防被建筑機械毀壞horvlC=+t~GD(AEGUJ4c。