They are inversing tide water swimming.是什么意思？

They are inversing tide water swimming.

他们逆着潮水游泳.

they

pron. 他/她/它们，人们，大家，政府，当局，她们；

例句
The storms had abated by the time they rounded Cape Horn.
他们绕过合恩角时，暴风雨已经减弱。

are

vi. （用于第二人称单复数现在时，第一、三人称复数现在时）是；n. 公亩（等于100平方米）；

例句
We are scared to abandon ourselves to our feelings in case we seem weak or out of control.
我们不敢放纵自己的情感，以免显得太过软弱或缺乏自制。

inversing

vt. 使倒转（inverse的现在分词形式）；

例句
They are inversing tide water swimming.
他们逆着潮水游泳.

tide

n. 潮汐，潮流，趋势，时机，时期，季节；vt. 顺应潮水航行，使随潮水漂

例句
The emergency services were working against the clock as the tide began to rise...
开始涨潮了，紧急救援机构正在争分夺秒地工作。

water

n. 水，雨水，海水，海域；v. 给…浇水，供以水，加水稀释，流泪；

例句
...a licence to abstract water from the River Axe...
从阿克斯河中抽水的许可证

swimming

n. 游泳，眩晕；v. 游泳( swim的现在分词)，漂浮，浸，泡，旋转；

例句
If the pool was open, we'd in all probability still be swimming in it...
如果游泳池还开着，我们完全可能还在里面游泳。