Why?--- I like to help people and put out fires.

The project was a bold one , full of difficulty, perhaps impracticable.

这个救人的打算是很冒险的, 是有困难的, 看来也是行不通的.

He helped the poor and rescued those in danger.

他济贫并救人于危难.

Saving lives and all must be real rewarding.

救人一类的事一定很值得称赞的.

Doctors work hard to save lives.

医生努力工作是为了救人.

If a digit is less that one, the power place value will be ( negative ).

如果位值小于一, 次方值就会是 ( 负数 ).

Nine is the second power of three.

九是三的二次方.

Any number raised to the power of nought equals one.

任何数乘以零次方等于一。

It later became apparent that rabbits were developing a degree of resistance to this disease.

后来,兔子显然对这种疾病产生了一定的免疫力.

Immunity for our island has gone too since we took to commerce.

自从我们开始对外贸易以来,我们岛国不受外界影响的免疫力已经不存在了.

Lush plants, though seemingly vulnerable, demonstrate enhanced immunity to diseases.

看似脆弱的茂盛植物对疾病表现出更强的免疫力。

It is surprisingly difficult to catch this disease, even though the majority of people are born with natural immunity.

大多数人天生具有自然免疫力，但这种疾病却出人意料地难以感染。

The body's tolerance to infection is lower due to weakened immunity.

身体对感染的耐受性因免疫力下降而更低。

Immature insects possess immunity, so it is necessary to spray regularly.

幼虫具有免疫力，因此有必要定期喷药。

Behind this explicit resolution there lay an implicit one.

这个明的决定背后还有个暗的决定.

The contrast of light and shade is important in photography.

在摄影艺术中明暗的反差是很重要的.

He arrives in his biplane and has to crash-land it on a rooftop.

他驾驶双翼飞机到达，不得不让它在屋顶上紧急降落。

A rebellious prisoner continued his stand against the authorities from the rooftop of the correctional facility.

一名叛逆的囚犯在惩教设施的屋顶上继续对抗当局。

The dormer roof serves to join the two gable ends seamlessly.

带天窗的斜屋顶的作用是将两边的山墙无缝连接起来。

We caught a glimpse of a quaint rooftop through the trees in the distant village.

透过树丛，我们瞥见了远处村庄一座古雅的屋顶。

A slender beam of light was aimed precisely toward the rooftop by him.

他将一束细长的光精准地对准了屋顶。