两次世界大战期间这一角色缺场，其后果是灾难性的。

Nobody did between the wars, and the consequences were disastrous.

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缺钾初期阶段的表现是，作物生长速度减慢，植株矮化，叶色通常发暗。

First signs of potassium deficiency are a reduction in growth rates. Plants become stunted and usually leaf colour is darker.

youdao

缺钾初期阶段的表现是，作物生长速度减慢，植株矮化，叶色通常发暗。

First signs of potassium deficiency are a reduction in growth rates. Plants become stunted and usually leaf colour is darker.

youdao