subsonic

subsonic

[sʌb'sɔnik]

adj. 比音速稍慢的, 次音速的

例句与用法：

A specific layer of soil or subsoil in a vertical cross section of land.

地层，岩层处于土地的垂直横截面中的某一具体土层或次土层

Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.

永冻土永久冰冻的下层土壤，出现在整个北极地区和部分长期寒冷的地区

词形变化：

名词: subsoiler | 动词过去式: subsoiled | 动词过去分词: subsoiled | 动词现在分词: subsoiling | 动词第三人称单数: subsoils |

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a.

亚音速的