Meaning of qián shuǐ:
潜水
to dive; to go under water; (in an online forum) to lurk
Wǒmen zài xiàtiān qù hǎibiān qián shuǐ.
我们在夏天去海边潜水。
We go to the beach to dive in the summer.
Tā jìhuà xià ge yuè qù Hǎinán lǚxíng shí xuéxí qiánshuǐ.
他计划下个月去海南旅行时学习潜水。
He plans to learn scuba diving when he travels to Hainan next month.
Zài zhège lùntán shàng yǒu hěnduō rén xǐhuān qiánshuǐ ér bù fābiǎo yìjiàn.
在这个论坛上有很多人喜欢潜水而不发表意见。
In this forum, many people like to lurk without posting any opinions.