1.Among almost seven hundred species of bamboo, some are fully grown at less than a foot high, while others can grow three feet in twenty-four hours.
在差不多七百种竹子中，一些最高长到不到一英尺高，而另一些却能够在24小时里长3英尺。
2. Before staring on a sea voyage, prudent navigators learn the sea charts, study the sailing directions, and memorize lighthouse locations to prepare themselves for any conditions they might encounter.
在开始一次海洋航行之前，谨慎的航海家观察海图，研究航向，识记灯塔的位置来为他们可能遇到的任何状况作准备。
3.Of all the economically important plants, palms have been the least studied.
在所有重要的经济植物中，棕榈树是被研究的最少的。
