Parvaneh tried to keep a straight face.

帕尔瓦娜强忍着不笑出声。

But honestly, I could hardly keep a straight face.

但是，坦白说，我简直很难做到不露声色。

I know. And I did it with a straight face.

我知道，我卖的时候可是全程故作镇定呢。

" His finest hour, " said Fred, unable to keep a straight face.

“那是它最辉煌的时刻。”弗雷德说，脸上忍不住要笑。

How Harry managed to keep a straight face during these performances is quite beyond me.

我实在想像不出哈里在这些表演中是怎样装出一本正经的样子的。

Hey...And with a straight face you're gonna tell students that America is so star-spangled awesome.

你......你还能面不改色地跟学生说美国是如此的了不起，如此的星光璀璨。

How are you saying that with a straight face? I don't know. You guys are being jerks.

你怎么做到一脸正经地鬼扯呢？我也不知道。你们俩真过分。

Her mother tried to keep a straight face.

她的母亲试图保持板着脸。

" To keep a straight face" (straight) – a straight face means not to smile, not to laugh.

“to keep a straight face” （直）——板着脸的意思是不笑，不笑。

They can't even keep a straight face.

他们自己都忍不住不笑的。

You actually saying that with a straight face?

你还真是认真说的？

How do you do that with a straight face?

这是天赋？

I can't do this with a straight face.

我没法一本正经的跟你聊这个。

Well, they said they didn't need to keep a straight face for long.

好吧，他们说他们不需要长时间保持板着脸。

I found it very difficult to keep a straight face.

【straight】我觉得很难板住脸不笑。

Priscilla burst out laughing, but Jackie kept a straight face.

普里西拉大笑起来，但杰基却板着脸。

Absolutely, and I run. You cannot with a straight face say that I am disabled.

绝对，我跑了。 你不能板着脸说我是残疾人。

But fathers and mothers! He shook his head. You can't expect me to keep a straight face about fathers and mothers.

可是那些‘爸爸’呀，‘妈妈’呀，他摇摇头。在那些‘爸爸’、‘妈妈’面前你就无法叫我板着面孔。

Luckily, we didn't need to keep a straight face for long.

幸运的是，我们不需要长时间保持板着脸。

I don't think I can call you " Dude" with a straight face.

我要是叫你" 兄弟" 一定会笑场。