They all look so comfortable and easeful with their lives here, without any upset or complaint for the tough living environment they are in.

它们看来如此的舒适安逸，似乎并未为自己所处生存环境的恶劣而有丝毫的悲哀与不满！

youdao

The reason they look so comfortable on stage is because they have practiced delivering every slide time and time again.

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