A low water cement ratio will make the concrete stronger.

低水灰比会使混凝土更坚固。

Low water of neap tide

小潮平均低水位

Low water of spring tide

大潮平均低水位

Low water ordinary neap tide

小潮平均低潮面

Low water ordinary spring tide

大潮平均低潮面

Water resources of low water period is only about 18.

枯水期水资源仅占全年水资源量的18.

Highest low water of neaptides

小潮的最高低潮

Mean low water lunitidal interval

平均月潮低潮间隙

Mean lower low water lunitidal interval

平均月潮低低潮间隙

Inference–that your brother was often at low water.

结论是：你哥哥常常窘困；