| 释义 |
DEFINITIVE EXAMPLES 权威例句〔CHANGE/NOT CHANGE〕We live next door to a busy street and there is always a constant level of noise in the background. 我们的家紧邻着一条热闹的大街，街上传来的噪音持续不断。朗文写作活用〔critical mass〕The smallest mass of a fissionable material that will sustain a nuclear chain reaction at a constant level.临界质量：裂变物质在恒量水平下能维持链式核反应的最小质量美国传统〔humidor〕A container designed for storing cigars or other tobacco products at a constant level of humidity.保湿盒：一种盒子，用于在一个稳定湿度下保存雪茄或其它烟草制品美国传统 |