可以说是心有余而力不足呀，主要因为当时根本没有渡海作战的能力。

It can be said to be very difficult, mainly because we did not have the ability to cross-sea combat.

youdao

晕船病是影响我军渡海作战能力的重要因素之一，对晕船病测试研究具有重要的现实意义。

Sea sickness is one of the most important factors which influence the fighting strength of crossing sea campaign, and it is very significant in reality to the testing of sea sickness.

youdao