adj.使低劣的，减少体力的，昏暗的
v.（使）降低， （使）跌落( lower的现在分词 ); 削弱; 削减; 减少

lowering speed → 下降速率；下降速度；松吊速度
lowering of freezing point → 凝固点降低；冰点降低
lowering of pressure → 压力下降
lowering of roll → 落刀；辊子降落
lowering device → 降落装置；卸落装置；卷筒纸卸落装置
Lowering off → 放绳下降；放绳降落
water lowering → 水位降低；地下水位降落
vapor pressure lowering → 蒸气压降低；蒸气压下降
lowering blood pressure → 降血压；降低血压

1.The lowering clouds threaten rain.
[汉]这阴霾的云层预示即将下雨。
2.Sam had a cut across one cheek, which made his unpleasant face more lowering than usual.
[汉]山姆面颊上的伤口使他本来就不好看的脸显得比平常更皱眉皱眼的。

【Noun】

1. the act of causing to become less
2. the act of causing something to move to a lower level
【Adjective】

1. darkened by clouds;
"a heavy sky"