1.battle against 與...斗爭，與...較量，與...搏斗
例句：She goes out to battle against depression.
她出門和愁煩作斗爭。
2.be a must 必不可少的事物；必要條件
例句：Therefore, leveling will be a must in order to complete some quests.
因此，升級是完成一些任務的必經之路。
3.be a mystery to sb. 對某人來講是個謎，不明白，不知道
例句：The private lives of the great' men: have ceased to be a mystery to us.
這些偉人的私生活對我們不再是秘密了。
4.be about to 剛要，正準備，就要做...
例句：He is about to turn on the light.
他要把燈打開。
5.be acquainted with 與...認識，了解
例句：Party committees should be acquainted with their work and check up on it, but would not attempt to take it over.
黨委應該了解和檢查他們的工作，但是不能包辦代替。
6.become addicted to 對...入迷，對...上癮
例句：Smoker who Inhale be likely to become addicted to nicotine
吸煙的人容易對尼古丁上癮。