A hard line means a severe, uncompromising way of acting.

" 红线" 是指一种严肃且强硬的行为方式。

They set up communication lines that would be hard lines.

他们设置了座机电话线进行通讯。

His lips pressed into a hard line, all signs of humor gone.

嘴巴咬得紧紧的，所有的幽默劲儿都不见了。

Our Cairo correspondent Aleem Maqbool says President Morsi has now taken a hard line.

BBC驻开罗记者阿里姆·马克波尔说总统穆尔西开始采取强硬手段。

We had to have a command centre indoors, so that we could use hard lines.

我们必须有个室内指挥部，这样才能使用座机电话。

Quinn's research gave ammunition to advocates pushing social media platforms to take a harder line.

奎因的研究为推动社交媒体平台采取更强硬路线的倡导者提供了论据。

So far, the government has taken a hard line, dismissing criticism from the U.S. and European Union.

到目前为止，土耳其政府采取强硬态度，驳斥了来自美国和欧盟的批评。

China hawks in Congress and the White House want Trump to take a harder line against the telecom giant.

美国国会和白宫的对华鹰派人物希望特朗普对电信巨头华为采取更为强硬的措施。

He says U.S. officials have taken a somewhat harder line in how they deal with issues of importance to Asia.

他表示，美国官员在处理对亚洲比较重要的问题方面采取了更加强硬的态度。

His closest Republican Party challenger for the 2024 nomination, Florida Gov. Ron Desantis, is staking out an equally hard line.

他在 2024 年总统提名中最接近的共和党对手、佛罗里达州州长罗恩·德桑蒂斯，也在采取同样强硬的立场。