VOA慢速英语:Filter Blue Light for Better Sleep

短语讲解：

1. Tap it to turn Night Shift on or off at any time.

at any time 随时; 任何时候
例句：He can't situate his recollection in any place or at any time.
他想不起在什么地方，也想不起在什么时间了。

2. In an update to Fire tablets at the end of last year, Amazon introduced Blue Shade to filter blue light on screens.
 
at the end of 在…结尾，在…末端
例句：At the end of the concert, the audience stood and clapped.
音乐会结束时，观众起立鼓掌。