關於Lighten的意思和用法的提問

A: thank you

A: to become less gloomy or serious

A: Something that occurs at the same speed as lightening strikes. Which is about 320,000,000 ft per second.

This phrase is used to indicate something is very fast (since most things do not actually move as fast as lightning)

A: My new computer is lightening fast.

A: Lighten up would be used as an expression if someone was being too serious about something.

Light up would be used if you were turning on a light or lighting a candle. It could also be used as an expression to say someone's smile lights up the room or their eyes lit up.

Hey man, lighten up!

The candle will light up the room.

Her smile lights up the room.

Her eyes lit up, when she saw it.

A: lighten up = be more cheerful or positive. It doesn't mean real light.
Ex: He's always so sad and I wish he would lighten up.

brighten up = usually means get brighter, as in real light. sometimes it can mean to be more cheerful, but it's not as common.
Ex: Painting the walls yellow really brightened up my room.

A: @Sierram: They're the same thing. "I lightened up the room with some lights." "I brightened up the room with some lights"

A: Lighten up: 気楽にやろう

A: Lightning