Sometimes, the side facing the Earth is the day side, and other times it is the night side: this is why we observe moon phases.

有时，面对着地球的是“白天半球”，其它时间则是“夜晚半球”：这就是我们为什么只能阶段性地观察月球。

youdao

Moon Phases is a free J2ME application that displays the current moon phase on your mobile phone.

月相是一个免费的J2ME应用程序，显示您的手机目前的月相。

youdao

The most popular functions among collectors are dual time-zones, moon-phases and chronographs.

最受收藏家欢迎的功能则是双时区、月相和计时器。

youdao

The watch adheres to horological tradition for grand complications with a rattrapante chronograph, a minute repeater, a perpetual calendar and moon phases.

WSJ: The Face of Watchmaking's Future at SIHH and GTE

This 18k pink gold openface watch is a minute repeating perpetual calendar split-seconds chronograph clockwatch with grande and petite sonnerie and moon phases, manufactured in 1898.

FORBES: Connect

The phases of the moon occur due to cycles among the moon, the earth and the sun.

FORBES: Expect Two Recessions Before End Of Decade