Suddenly the bell rang and we got into our classrooms.
突然间铃响了，我们到了我们的教室。
Suddenly, I know all the answer, but the bell rang.
突然之间，我知道了所有题目的答案，但是铃声响了。
On the playground when the bell rang, and the silent suddenly boiling up, some make a snowman and have snowball fights.
下课铃响了，寂静的操场上顿时沸腾起来，有的堆雪人，有的打雪仗。
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