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重点讲解：
1. be close to 近的；接近的；
例句：The building is close to public transportation.
房子离公交设施较近。
2. take care of 照顾；照看；看护；
例句：You have to learn to take care of your possessions.
你得学会保管好自己的财物。
3. be filled with (使)装满；(使)注满；(使)充满；
例句：The forest was filled with the sound of running water.
森林中处处都能听到流水声。
4. used to do sth. 过去常常；过去曾；
例句：Mum and I used to fall out a lot.
我和妈妈过去经常争吵。
n. 牙，暴牙，牙状物
vt. 以牙刺戳，以牙
