unproductive
词形变化：
副词: unproductively | 名词: unproductiveness |
同义词：
barren | fruitless | worthless | fallow | abortive | infertile | sterile | blocked | idle | lazy | slow | wasteful | inefficient | ineffective | useless |
反义词：
词义辨析：
同义参见:
fruitless
worthless
fruitless
abortive
barren
fallow
反义:
a.无生产的; 无收益的
productive