| 释义 |
- n.（数量的）减少；（质量的）降低
- 网络衰减；尖削度；下降
1. | [sing] ~ (in sth) （数量的）减少；（质量的）降低a reduction in the number, amount or quality of sth |
| a recent fall-off in sales 近来销售量的减少 |
n. | 5. 【宇宙空间技术】(火线各级的)分开,散开,排出 5. 【宇宙空间技术】(火线各级的)分开,散开,排出 |
n. | 1. a reduction in the amount or level of something |
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