For tidal energy to be effective, the difference between high and low tides needs to be at least five metres, and this occurs naturally in only about forty places on Earth.

要让汐能有效，高和差值需要至少是五米，而这只会全球大概四十个地方自然发生。

Whether the region's maritime features are" islands, rocks, or just low-tide elevations"

评判岛屿礁石到底是岛，岩石还是（落才能露出）高地。

The low tide then flushes the water back out to sea.

然后又会将海水冲回大海。

And do the low intensity stuff, like sending daily emails, when you're in slump time.

期就做一些强度事情，比如每天发送日常电子邮件。

Seawalls are rebuilt as soon as it's low tide, only to be broken down again by the waves that grow higher each year.

海堤就会被重建，但是又会被每年都上涨巨浪摧毁。

I met Phil when I was at such a rocky place in my life.

我人生最认识菲尔。

It's a huge political crisis. Sunday was the low point for Santos' presidency.

这是一场巨大政治危机。上周日是桑托斯就任总统以来遇到期。

I believe this is just a phase and I'm willing to wait it out.

我相信这只是一个，我愿意等。

Yet there, at his life's lowest, the remarkable happened.

然而，他人生最，奇迹发生。

Principles always become a matter of vehement discussion when practice is at ebb.

当实践陷入，原则总是成为激烈讨论问题。

If you have an oyster reef that's " intertidal" — that sticks up at low tide — then it can perform some of that wave energy protection function.

如果“间带”有一个牡蛎礁——期它会竖起突出——那么它就可以发挥一些波浪能量保护功能。

For a long time there was a lull in the 'mud–pie' business, and she devoted herself to the finest pen–and–ink drawing, in which she showed such taste and skill that her graceful handiwork proved both pleasant and profitable.

有很长一段间，她“泥饼”行业处于，她便开始专注于极精细钢笔画，作品中展示她品味与技巧，结果使这些优美画既令人赏心悦目又有利可图。

If you're a college student who, say, is in a downward spiral, and you feel helpless and hopeless, unabated, that could cost you your life.

如果你是一个大学生， 你处期，你觉得无助和无望，这可能让你失去生命。

Born and raised outside London, Ive joined Apple in 1992, when the company was nearing its lowest ebb. But Ive became a key player in the company's revival after its founder Steve Jobs returned in 1997.

艾维伦敦附近出生长大，他 1992 年加入苹果公司，那，苹果正接近它最期。但是 1997 年，苹果创始人史蒂夫·乔布斯回到公司以后，苹果公司重新崛起，艾维这个过程中扮演重要角色。

" We get to all come together and drink and laugh and talk about the show and all the highs and lows. It's ending on a big note."

“我们聚一起畅饮、欢笑，谈论这部音乐剧所有高和。它会以一个重要音符结束。”

There were undoubted low points, but the mass outpourings of affection on her silver, golden and diamond jubilees testified to the special place she held for millions.

尽管不乏期，但人们对她登基周年纪念展现情感，证明她数百万人心目中特殊地位。

Taking advantage of the low tide, some of them had moved forward over the heads of coral to within two cable lengths of the Nautilus.

有些土人乘着，来到珊瑚石尖上，离诺第留斯号约四百米远。

Why did I work so hard in order to get into this place? If it doesn't matter, if I experience this ups and downs.

我为什么要拼命入读这所学校 如果这些都无关紧要 总要经历高?

That was definitely a low point for Jeremy because it was like, " Hey, we've got to retool and try again."

对于杰里米来说这绝对是个期，但他还要坚持“嘿，我们还得调整，继续尝试。”

How stupid of me not to realize that it was possible to get to Mull, twice a day, at low tide!

我多傻，竟没有意识到我能乘一天两次地到马尔！