I've heard that if you open your mouth and swallow hard, your ears won't pop.

我听说如果张开嘴，使劲咽唾沫，耳朵就不会胀痛了。

youdao

Media companies may have to swallow hard before tethering their futures to any high-tech company, let alone Apple.

媒体公司们在将它们的未来绑定于任何高科技公司之前也许还不得不忍气吞声，更别说苹果公司了。

youdao

I found her excuse very hard to swallow.

我觉得她的理由很难让人相信。

《牛津词典》

The White House must have had to swallow hard at this partial nationalization of private banks.

NPR: Expanded Bailout Differs From Original Plan

In order not to jeopardise Mr Putin's visit, Poland has to swallow hard when its history is traduced.

ECONOMIST: Russia needs to play nice

Rybak announced that he was prepared to swallow hard and make significant cuts to public works and public safety.

WHITEHOUSE: The Recovery Act Blog