primary productivity的用法和樣例：
例句
- Ferns were the first terricolous vascular plants, and still comprise an important part of primary productivity of ecosystems.
蕨類(lèi)植物是最早登陸的維管植物，至今仍然是生態(tài)系統初級生產(chǎn)力的重要組成部分。 - The results indicated that the aboveground net primary productivity of the ecosystem was more related to the dynamic changes of precipitation and temperature.
結果表明，高寒草甸凈初級生產(chǎn)力的動(dòng)態(tài)行為以對降水和氣溫的即時(shí)直接響應為主。
