Bacteria under the microscope, even those with no flagella, often bounce about in the water.

在显微镜下面的细菌，即便是那些没有鞭毛的，也时常在水中乱跳。

Players complained about the uneven bounce of the tennis court.

运动员抱怨说网球场的反弹力不均匀。

But we'll not get too down about it, we'll move on and bounce back. We have to.

但我们不能因为这个而太忧伤，我们必须继续前进，把接下来的比赛赢回来，我们必须赢。

The bounce house in the picture above is on sale through Little Tikes for just $199 (a rental costs at least $100), but I worry about the quality.

图片上的弹跳屋在小健力上有卖，而且只售$199（租一次至少$100），但是我有点担心它的质量。

If you were happy prior to losing your job, you'll be happy again, says Bonanno, whose findings suggest it takes about a year to bounce back.

如果你在失业之前是开心的，你就会快乐下去。皮萨诺在他的研究中发现一年的时间可以恢复一切。