A lot of tubes run through the water tank carrying chilled glycol, a fluid that freezes at a very low temperature - far below that of regular water.
水箱中有很多流淌着冷却用的乙二醇的管子。乙二醇液体的冰点的温度，远低于常规水的冰点。
2
A keel also provides weight low under the water to lower the boat's center of gravity below the waterline, which is needed so that the boat bobs back upright if knocked over by wind or waves.
The water under the bridge is now low and filthy, looking almost chemically polluted, with lots of litter thrown onto the dry ground just below the bridge.