他在口头上表达情感时感到困难。

He struggled with expressing his emotions verbally.

我们应该用实际行动来孝敬父母，而不仅仅是口头上说说。

We should show filial respect for our parents through actions, not just words.

我们重新调整对争论的看法——从口头上的争吵到理性的交流。

We readjust our view of arguments—from a verbal fight to a reasoned exchange.

这不仅是口头上的誓言

These are not only words

争论尤指口头上的争斗；

A combat, especially a verbal one; a debate.

我们通常是口头上的沟通。

B︰We usually use verbal communication.

他们只是口头上说有必要进行研究工作.

They paid only lip service to the need for research.

大多数的车手都只是口头上赞成这条戒律；

Most cyclists pay lip service to this commandment;

它通常是口头上的，有时候则是书面的。

It is usually oral but sometimes it will be in written form.

这可能只是口头上的，旨在安抚国内的民众。

This could simply be rhetoric, designed to appease a domestic audience.