Grey poplar
银白杨
🧩 词语组成解析
grey
[ɡre]
adj. 灰色的;灰白的;
vt. 使变成灰色;使变老;
vi. 变成灰色;老化;
n. 灰色;
poplar
['pɔplə]
n. 杨树;杨木;
🗣️ 情景例句
where we had our meals ...
我们用餐的地方……
To negotiate the agreement
商议同意
This depends on the precise radio frequency of the 21-cm wavelength, or 1420 megacycles per second.
这种通讯联系要靠21厘米波段，即每秒1420兆周的精确无线电频率。