If you prefer to stay in cheap hotels while travelling, make sure you can lock the door of your room from the inside.
如果你在旅行时喜欢住便宜的旅馆，一定要确保你能从里面锁上房间的门。
The lock creaked now from inside, and an old man opened the door.
锁从里面发出嘎吱嘎吱的声音，一位老人打开了门。
In the same way that chewing gum in a lock makes it hard to open your front door, fat particles inside muscle cells interfere with insulin's efforts to open the cell to glucose.
锁内的口香糖使得前门难以打开，同样地，肌肉细胞内的脂肪颗粒干扰胰岛素为葡萄糖打开细胞的努力。
Mother Goat goes away. Her kids wave good-bye. Then they go inside and lock the door.
山羊妈妈走了，孩子们挥手跟妈妈再见，然后他们就进屋锁上了门。
Mother Goat goes away. Her kids wave good-bye. Then they go inside and lock the door.
山羊妈妈走了，孩子们挥手跟妈妈再见，然后他们就进屋锁上了门。
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