我们刚完成了第一次水下维修，发现有一个水管已经破裂了。
We have just done our first underwater repair, having found a piece of timber had broken.
由于受其地理位置和环境条件制约，无法实现干地施工，水下维修也有相当大的难度。
For restrained by project location and environment condition, impervious treatment can not be performed in the dry, underwater repair is also difficult.
潮汐能的一个问题是维修水下设备比较困难。
One trouble with tidal power is the difficulty of servicing underwater installations.
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