with a straight face meaning in English

绷着脸

With a straight face speer appointed ley on the spot "commissioner of death ray" .
斯佩尔装出一本正经的神气，当场委任莱伊为“死光制造局局长”。
She say with a straight face she see green spacemen in the back yard
她面无表情地说她在后院看到绿色外星人。
She said with a straight face she saw green spacemen in the back yard
她面无表情地说她在后院看到绿色外星人。
With a straight face speer appointed ley on the spot " commissioner of death ray "
斯佩尔装出一本正经的神气，当场委任莱伊为“死光制造局局长” 。
When asked by a young and inexperienced reporter the cliche question of whether it was hard work or talent which brought him his nobel prize , he gave the following unexpected answer with a straight face and plenty of hidden wry humour talent of course
的问题,即他的诺贝尔奖是努力还是天分的结果。丁教授一本正经,以微带幽默的语气答曰： “当然是天分！ ”