umbra的例句大全

A fringe region of partial shadow around an umbra.

边缘地区的部分阴影。

moon enters umbra: instant of first external tangency of moon with the umbra.

初亏：月球由东缘慢慢进入地影，月球与地球本影第一次外切。

This includes the continuous survey of umbra and penumbra of the sunspot.

这包括对太阳黑子本影和半影持续的观测.

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.

This is a lighter area between the umbra and the edge of a shadow.

这是本影和阴影边缘之间较亮的区域.

It was found that an anormal light bridge formed in the old main spot when the two umbrae merged into one instead of the opposite case, i. e., one umbra split into two.

老黑子中发现一个反常光桥，它是在两个本影合并起来时形成，而不象通常在黑子将分裂时出现。