If your water picks up calcium and magnesium in large amounts en route to your tap, it's considered hard water.

如果你的水在通往水龙头的途中大量吸收钙和镁，那就被认为是硬水。

He can sit dead still in the water, pick up on any vibration from a fish swimming, turtle going by, bird wading in the water, doesn't really matter.

它可以坐在水里一动不动，接收来自鱼儿游动、海龟经过、鸟儿涉水的任何振动，这都是小事。

He can sit dead still in the water, pick up on any vibration from a fish swimming by, turtle going by, bird wading in the water, doesn't really matter.

他可以一动不动地坐在水里，鱼儿游过，乌龟经过，鸟在水里涉水而过，任何震动他都能感应到，这些都无关紧要。

Help conserve water, pick up litter and trash that could someday get washed into the ocean, and be sure to only buy tuna that is caught using methods that are safe for dolphins.

节约用水，随手捡起垃圾。以防它们某天就被冲入了海洋，只购买用不伤害海豚的方法捕获的金枪鱼。