差不多700种竹子中，有一些长不到1英尺高，而其他一些能在一天内生长3英尺。
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.
起航前，谨慎的航海家会研究熟悉航海图、研究航线、记忆灯塔位置，做好应对各种可能情况的充分准备。
Before starting 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 encountered.
在所有重要的经济作物中，人们对棕榈树的研究最少。
Of all the economically important plants, palms have been the least studied.
