Check and optimise parameters of environmental impact regularly.

...a mood of cautious optimism.

谨慎乐观的心态

He is a man of apparently boundless optimism.

他显然是一个极度乐观的人.

I set off, full of optimism.

我无比乐观地出发了。

Optimism was gradually taking the place of pessimism.

乐观情绪逐渐取代了悲观主义。

There are very real grounds for optimism.

的确有理由可以乐观。

optimism about/for the future

对未来的乐观

Every day of sunshine strengthens the feelings of optimism.

每天晒太阳让人心情更加开朗。

a mood of cautious optimism

谨慎乐观的心情

The Indian Prime Minister has expressed optimism about India's future relations with the USA.

印度总理对未来的印美关系表示乐观。

We may now look forward with optimism .

我们现在可以乐观地展望未来。

Don't pour cold water on their optimism.

别给他们的乐观态度泼冷水.

I am a good Chinese lady, beautiful, kindness, optimism, gentle and, have the very strong responsibility.

我是一个很好的中国淑女, 漂亮,温柔, 仁慈, 乐观, 关心体贴, 有很强的责任心.

Optimism made him alive through the hard days.

乐观主义使他在艰难的岁月里活了下来.

An optimist sees an opportunity in every calamity; a pwssmist sees a calamist every opportunity.

乐观的人在灾难中看到希望; 被告的人在希望中看到灾难.

My answer is an optimist.

我的答案是乐观者.

Optimist: A man who gets treed by a lion but enjoys the scenery.

乐观主义者: 被狮子逼上了树但仍能欣赏风景的人.

Optimist: you refuse the parachute because people have survived crashes just like this before.

乐观的 ︰ 拒绝这个降落伞,因为以前也有人在坠机时,幸存下来.

An optimist stays up until midnight to see the new year in.

乐观者等至深夜,为的是看到新的一年开始.

An optimist sees an opportunity in every calamity; a pessimist sees a calamity in opportunity.

乐观地人在灾难中看到希望; 悲观地人在希望中看到灾难.

An optimist see an opportunity in every calamity, a pessimist see a calamity in every opportunity.

乐观者从灾难中看到良机, 悲观者从良机中看到灾难.