When d is large in comparison to lambda the obstacles cast shadows.

当距离大于λ,屏障也会投下阴影。

麻省理工公开课 - 固态化学导论课程节选

because they are votes that mean something to the people that cast them.

因为这些选票是选民仔细考虑后投下的。

对于义务投票制 - SpeakingMax英语口语达人

If this distance is large in comparison to the wavelength, this dam simply casts a shadow.

如果这个距离,比波长更长，水槽中的屏障就会投下阴影。

麻省理工公开课 - 固态化学导论课程节选

It is like light casting a shadow.

就好像光线投下影子。

麻省理工公开课 - 固态化学导论课程节选