Though "easy" may be welcome, unluckily it's of little use for any long time development of reading skills and the general language level.

虽然“简单”可能是受欢迎的，但不幸的是，它对长期发展阅读技能和一般语言水平几乎没有用处。

youdao

It has long been known that the level of serum iron in animals falls during infection.

人们早就知道，在感染期间，动物的血清铁水平会下降。

youdao

Sensible ideas have been around for a long time, but the state-level bodies that govern the profession have been too conservative to implement them.

尽管合理建议的提出已有很长时间了，但是监管这个行业的州级机构过于保守，不愿实施。

youdao

But in fact academic studies have shown that this is wrong-footed and that in the long run by not having a level playing field, by not building systems, by not creating competitive markets you are actually undermining development and you are undermining economic growth and you are taking away the trust of potential investors."

VOA: standard.2009.11.17

Even though the deposits are short-term and the depositor can get the money at any time, the depositor is earning interest of a level that can only be made on long-term loans.

即使是短期存款,存款人可以随时取走存款,存款人也可获取仅从长期贷款中,才可得到的利息水平

耶鲁公开课 - 金融市场课程节选

You will out-work anybody, as long as the level -- as long as the playing field is level.

WHITEHOUSE: President Obama Speaks On Promoting American Manufacturing and Exports | The White House

Andrew Carnegie, eighty-three, once the mightiest industrialist in all the world, now a wizened and influenza-ravaged man who for nearly two years had been under doctors' care in his block-long, six-level mansion on Gotham's Millionaire's Row, took up the instruments brought to him and began to write as if possessed.

NPR: Excerpt: 'Meet You In Hell'

Their recovery might not be so much better than ours, but they did have a much better crisis, with smaller consequences for the long-term level of national income.

BBC: Eurozone growth: Comparing the UK with Europe