重點講解：
1. be absent from 不在的；缺席的；
The pictures, too, were absent from the walls.
那些畫也不在墻上了I4AKtG;PU#;x。
2. hang around （在某處）等待，閑逛，閑呆著；
Humans, the story goes, realized this was rather useful, and let the least aggressive pups hang around.
傳說，人類意識到這種動物很有用，于是允許一些最不具攻擊性的小狗在人類居住地周圍徘徊vTl,eShumDD+1%Z。
3. in theory 從理論上說；照理說；
In theory, these machines should last for ten years or more.
從理論上講，這些機器應能用十年以上)MqI@AKGx=U|Y]Ei!s3d。
4. take into account 考慮到；把…計算在內；
Coursework is taken into account as well as exam results.
除考試結果外，課程作業也要計入成績xU^2Q%(y|rRM5AAW8。