难得

At times, I would flip the fishes a bit. And sometimes, they also put on an act, pretending to be fast asleep. And when I turn my back, they jump above the water. Then I'll know that they are hungry. If I'm in a good mood, I'll "serve" them. If not, then I leave them to have their "hungry dreams".

有时，我会俯首看看这些鱼，有时，这些鱼也跟我演戏，假装睡着了，我一转身就在我后面跳出水面，我就知道它们要宵夜，心情好，就伺候他们，心情不好，我就难得理它们，让他们作"饿梦"。

Six lines of building base of quadrangle was discovered in Yin Ruins.

对殷墟某一区域建筑基址的大面积揭露，在殷墟考古上是极为难得的。

Although the style of fighting which involves kicking a man when he is down, gouging out his eyes, and kicking him in the testicles does not appeal to the average American, we must forget the Marquise of Queensberry and his often violated rules of sportsman like combat when dealing with our Jap and Nazi enemies.

尽管这种风格的格斗包括一些普通美国人难得见到的东西：当对手倒地时猛踢他、挖他的眼睛、踢他的裆，但是在对付日本和纳粹敌人的时候，我们必须忘记那位昆士伯利的侯爵以及他那种经常犯规的竞技运动式格斗的规则（指英国"昆士伯利拳击规则"——译注）。

Although the style of fighting which involves kicking a man when he is down, gouging out his eyes, and kicking him in the testicles does not appeal to the average American, we must forget the Marquise of Queensberry and his often violated rules of sportsm

尽管这种风格的格斗包括一些普通美国人难得见到的东西：当对手倒地时猛踢他、挖他的眼睛、踢他的裆，但是在对付日本和纳粹敌人的时候，我们必须忘记那位昆士伯利的侯爵以及他那种经常犯规的竞技运动式格斗的规则（指英国"昆士伯利拳击规则"——译注）。

Quickstep is rarely taught in Beijing.

这是很难得的学习机会。请大家不要错过！

Among Schubert's best-known chamber music is the delightful Trout Quintet for Piano and strings written on one of his few holidays

舒伯特最有名的室内乐中有人们喜爱的钢琴五重奏《鳟鱼》，这是他在很难得的一个假日写成的

Yes, it's a rare opportunity.

是，这是个难得的机会。

This is a rare opportunity in life.

这是一生难得的机会。

This is a rare opportunity in your life.

这是一生难得的机会。

It is a rare chance in your life.

这是一生难得的机会。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。