1. Everyone knows that if he shouts in the vicinity of a wall or a mountainside, an echo will come back.
    大家都知道，在墙壁或山腰附近发出的喊声，就会听到回声。

2. Every awkward attempt meets with sympathy and encouragement, and the most difficult step on the path of language becomes the merriest game.
    每一次尴尬的尝试都会受到同情和鼓励，这样在语言学习道路上最困难的一步变成了最愉快的游戏。

3. Each meeting focused on one step.
    每次会晤都着重讨论一个步骤。

4. Before returning home at night, he took a shower and changed back into his suit.
    晚上回家前,他洗个淋浴,又换上他那套西装.

5. Because of this, we kept looking back, wondering if we were leaving a trail of oil and petrol behind us.
    因此，我们不时地掉过头，怀疑车后是否留下了机油和汽油的痕迹。

6. Before we had time to worry about what might happen, we were back on the plain again.
    我们还未来得及担心后果，车已重新开上了平地。

7. Before returning home at night, he took a shower and changed back into his suit.
    晚上回家前，他洗个淋浴，重新换上那身黑色西服。

8. By January 10th, I was back to where I had started from.
    到了1月10日，我恢复了原来的作息时间。

9. Back in the train, we told each other what a wonderful time we had had that day.
    回去的火车上，大家都说，这一天过得真愉快。

10. But I am going to buy them all back again now!"
    不过现在我要把这些东西一一买回来。”