| 单词 | downdraft |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔clear-air turbulence〕A severe atmospheric turbulence that occurs under otherwise tranquil conditions and subjects aircraft to strong updrafts and downdrafts.晴空湍流：一种剧烈的空气湍流，发生在其它方面平静的条件下并使飞行器发生强烈的上下颠簸美国传统〔downdraft〕The business hit a downdraft.生意衰退美国传统〔wind shear〕A change in wind direction and speed between slightly different altitudes, especially a sudden downdraft.风的切变：在稍微不同的纬度之间风向和风速的变化，尤指突然的下沉气流美国传统 |
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