poor in的用法和樣例：
例句
- The country is poor in minerals.
這個(gè)國家礦物不豐富。 - Mars is too dry and poor in oxygen.
火星上面過(guò)于干燥，并且缺乏氧氣。 - Our family was very poor in the bygone age.
我家過(guò)去很窮。 - Everyone is weary: the poor in seeking, the rich in keeping, the good in learning.
人人都在奔忙：窮人尋求，富人守財，好人學(xué)習。
