做填空的时候很郁闷,不晓得它什么时候表转折,什么时候表时间,例如
While not teeming with the colorfully obvious forms of life that are found in a tropical rain forest, the desert is ____ to a surprisingly large number of species.
如果是表示转折的话答案是host 但是如果是表示时间的话,我就选了hostile 了,求如何判断while,最好举个例子