质量和能量——我是个开系，对吧？

Mass and energy — I'm an open system, right?

youdao

因此热水瓶不是个开系。

So the thermos is not an open system.

youdao

御茶香系列之茶开富贵茶香枕，系原生态健康睡眠产品。

The series will open on tea pillow, will rich original health products.

youdao

佢系个性格开气嘅女孩，和佢喺兼埋，见到嘅永远系佢嘅笑面。

She is a cheerful girl, with her, see her smiling face will always be.

youdao

佢系个性格开气嘅女孩，和佢喺兼埋，见到嘅永远系佢嘅笑面。

She is a cheerful girl, with her, see her smiling face will always be.

youdao