Is there any time refrain on my study schedule? How many times can I re-play my online-courses?

课件在学习的时间和学习的次数上有没有限制？是否可以重复播放？

youdao

Pot and field experiments were conducted to study the mechanism of rare earth (RE) on effect of increase peanut yield.

通过砂培和田间小区试验以及电子显微技术，研究了外源稀土对花生的增产机理。

youdao

After drying up, bdelloids come back to life when re-exposed to fresh water. The Cornell study is featured on the cover of the Jan. 29 issue of Science.

这种蛭形轮虫干了以后，如果再遇到淡水就会复活。今年一月，科学杂志29期的封面刊登了康奈尔大学的这一研究成果。

youdao

And that's another, another ongoing study that we're working on at the moment.

NPR: Study: Dolphins Call Out Their Own Names

That is the opening paragraph to an article I wrote just the other day on Social Media Today re: a case study article about Atlantic Station, one of the biggest outdoor mixed use malls in the entire country, and how they are seeing the fruits of their engagement labor and then some.

FORBES: Engagement Marketing Fever - Are Marketers Finally Catching It?

Landowners and industry say they're missing out on an economic boom while environmentalists say the administration should have ordered a full health study and has been too opaque about the regulatory process.

NPR: AP: NY Fracking Held As Cuomo, RFK Jr. Talk Health