I will keep smile, give the lonely some support and the hug from heart!

我要保持微笑，给寂寞的人一些依靠，给孤单的人心灵的拥抱！

youdao

Always keep smile and eye contact, but must not be overly patronizing.

始终保持笑容和目光交流，但是一定不能过于做作。

youdao

Will she keep that smile glowing long beyond the nuptial bliss?

FORBES: Prince William And Kate Middleton's Royal Wedding: The Honeymoon

Another trick for the TV camera: keep a slight smile on your face WHILE you are talking.

FORBES: Smile For The Camera -Media Training

The only way around this is to put, and keep, a slight smile on your face whenever you are in front of a TV camera.

FORBES: Smile For The Camera -Media Training