New Words：

break [breɪk] v.(使)破，裂，碎;弄坏;损坏;坏掉;弄破;
broke [brəʊk] break的过去式
broke down 临时出故障的；受损事故发生故障

The dog bit me but didn't break the skin.
那条狗咬了我，但没咬破皮肤。

She fell off a ladder and broke her arm.
她从梯子上掉下来，摔断了胳膊。

The bus broke down on the way.
公共汽车在路上抛锚了。

The bridge broke down.
桥坍塌了。

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