讲解
今天推荐给大家的歌叫做Flashlight

And the key word in this song is Flashlight
Flashlight f-l-a-s-h-l-i-g-h-t
手电筒 闪光信号灯

A flashlight is a small electric light(电灯) which gets its power from batteries（电池） and which you can carry in your hand.

Here is an example:
I could see the beam of his flashlight waving around in the dark.
我可以看到他的手电筒光在黑暗中上下舞动。


"Flashlight" is a song recorded by British singer Jessie J for the soundtrack to the 2015 film ‘Pitch Perfect 2 ’.但在电影完美音调2中这首歌是以纯人声，Acappella 的形式演唱的。

A-cappella [a kap?p?lla] music is specifically group or solo singing without instrumental （乐器）accompaniment。无伴奏纯人声演唱。

And the lyrics describe a special person in your life who is always there for you. Who shows support in the hard times and who guides you, like a flashlight, when you are lost in the dark.

Here are some sentences from the song:

When tomorrow comes
I'll be on my own
Feeling frightened（害怕） up
The things that I don't know
When tomorrow comes
I'm stuck in the dark but you're my flashlight
You're getting me through the night

I really like the message of this song. I think it fits the people who are just about to start a new journey or a new life. We hope all of you can find someone to be your own flashlight.也希望英语悠选能在你需要的时候成为你的flashlight.