| 释义 |
ground frost
ground frost n (Physical Geography) the condition resulting from a temperature reading of 0°C or below on a thermometer in contact with a grass surface Translationsground frost
ground frost[′grau̇nd ‚frȯst] (meteorology) In British usage, a freezing condition injurious to vegetation, which is considered to have occurred when a minimum thermometer exposed to the sky at a point just above a grass surface records a temperature (grass temperature) of 30.4°F (-0.9°C) or below. |