差不多在700多种竹子中，有些长大成熟还不到一英尺高，而有些可以在1天之内就能长3英尺高。
Among almost seven hundreds species of bamboo,some are fully grown at less than one foot high,while others can grown three feet in twenty-four hours.
谨慎的航海员在出航以前，会研究航海图，确认航海方向，记录灯塔位置，以便为在航海中所能遇到的任何事情做准备。
Befor starting on a sea voyage,prudent navigators learn the sea charts,study sailing directions,and memorize the lighthouse locations to prepare themselves for any conditions they will encounter.
在所有的重要经济作物中，棕榈是最不值得研究的。
Of all the ecomonically import plants,palms have been the least studied.
