1. Early next morning, she heard planes passing overhead and wondered how she could send a signal.
    第二天清晨，她听到头上有飞机飞过，却不知道怎样才能发出信号，

2. Early next morning, she heard planes passing overhead and wondered how she could send a signal.
    第二天一大早，她听到头顶上有飞机飞过，但不知道怎样才能发个信号。

3. Before long, the noise dropped completely and the boat began to drift gently across the water.
    没过多久，噪音便彻底消失，快艇开始在水面上慢悠悠地漂流。

4. But the ratio is even greater among active women, affecting up to 80 percent of female endurance athletes.
    而这一比例在积极锻炼的妇女中数值更高，女耐力运动员中缺铁的则高达80%。

5. But we are the ones who signal to businesses that what they are doing is okay — every time we buy their products.
    每当我们购买他们的产品时，我们就在向企业发出信号，告诉他们可以这样做。

6. We heard a great noise.
    我们听到一个很大的响声。

7. We divided it in the ratio of 3:1.
    我们按照三比一的比例将它分开。

8. What is needed in the case of noise is a study of large numbers of people living under noisy conditions,
    对于噪音问题，需要对大量生活在噪音中的人进行研究，

9. If there is any effect of noise upon mental health,
    如果噪音对精神健康有影响的话，

10. Whatever the source of noise, one thing is certain: silence, it seems, has become a golden memory.
    不管噪声来自何方，有一点是肯定的：看来寂静已变成一种珍贵的回忆。