重点讲解：
1. insert into 插入；嵌入；
例句：He took a small key from his pocket and slowly inserted it into the lock.
他从口袋里掏出一把小钥匙,慢慢地插到锁眼里-Fxz2get|due!t。
2. for example 例如；比如；
例句：For example, a research paper could be made into a video but would not be as easy to follow as the text.
比如，一份研究论文可以制作成视频，但不如文本易于理解tuMe9YKolD[FB。
3. at least 至少；起码；
例句：At least this second meeting had helped to thaw the atmosphere.
这第二次会议至少起到了缓和气氛的作用![vmn^nD.QAd2O。