umbra相关的词根或词缀是: umbr

复数： umbras umbrae

Umbra rain glazed pewter waste can .

本影有雨釉面白蜡废物罐。

Only moon umbra totally puts on earth , the shadow area can watch the eclipse .

唯有在月球的本影投影在地球表面时，在该区域的人才能够观测到日食。

During an average total lunar eclipse , the moon is within the earth 's umbra for about an hour . This is called totality .

月全食发生时，月亮在地球的本影中大约要持续1个小时，这就是所谓的“全食”.

Occurs when the moon is completely within the umbra shadow and takes on a reddish appearance .

发生，当月亮完全地在本影阴影之内并且承担一次带红色出现。

When the moon enters the umbra shadow , its bright side diminishes little by little .

当月亮进入本影阴影时，它的光明面逐渐减少。