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。

youdao

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.

龙骨同时也增加了船只的底部重量，从而将船只重心降到吃水线之下，而这对于船只在被风浪打翻时能够得以及时回正是十分必要的。

youdao

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.

在桥下面的水是现在低廉的和污秽，几乎用化学看污染，借由在正好低于桥的干旱接地之上被丢的许多凋落物。

youdao

The Environment Agency said 80% of river flows were now above normal or higher, with reservoirs showing a good recovery and just 11 groundwater sites below normal water levels - and two "exceptionally low".

BBC: Hosepipe bans: Final four companies lift restrictions

Pesticides and other chemicals that could mimic estrogen and disrupt the normal development of salmon are present in the Columbia's water, Nagler said, but at very low concentrations - far below those used in laboratory experiments.

CNN: Something's fishy with chinook salmon

The need to drill for oil in 5000 feet of water and 20, 000 feet below the ocean floor is a dramatic illustration of how the low hanging fruit are long gone and the lengths to which our addiction to oil will drive us.

FORBES: Looking Beyond The Oil Spill