Both papers study the convenience yield of EUA futures using data available during the first phase of the EU ETS.

Crude oil, natural gas and coal also affect EUA price.

EUA价格也受原油、天然气和煤炭等能源价格影响。

He is as busy as a bee trying to put the house in order.

他为了要把家里弄得整整齐齐，忙了好一阵子。

But we have also heard the saying "as busy as a bee." Some bees will work only several hours, while some will work over 12.

有句英国谚语叫“像蜜蜂一样忙碌”，有的蜜蜂一天只要工作几小时，而有的竟然要工作超过12小时。

Busy as a bee, you always have a project in the works!

像蜜蜂一样忙碌的你总是在进行着一个项目！

She never seems to have time to talk. She's always busy as a bee.

她是个大忙人，好像总是没有时间说句话。

Kathy never has time to be bored. she's as busy as a bee from morning to night.

凯西从没有时间烦恼。她从早到晚像蜜蜂一样忙个不停。

Mum is always as busy as a bee in the morning.

妈妈每天早上都忙得不可开交。

Don't bother Mr.B; he is always as busy as a bee.

别打扰B先生；他老像蜜蜂般忙个不停。

My mother is always as busy as a bee.

我妈妈总是很忙。她总是像蜜蜂一样忙碌。

My wife never has time to get bored. She's as busy as a bee from morning to night.

我妻子从来不感到厌烦。她总是从早到晚像蜜蜂一样忙碌着。

He is as busy as a bee once in a while.

他有时也像蜜蜂一样忙碌。

I found myself filling my time up with endless work meetings and social events, rushing along as busy as a bee.

我发现自己把时间都用在没完没了的工作会议和社交活动上，忙得像蜜蜂一样。

Mr.A cannot see you right now; he is as busy as a bee.

先生现在不能见你；他忙得不可开交。

Shelly's father is always as busy as a bee.

雪莉的父亲总是非常忙碌。

It is a shame for me to talk about again that I have been busy as a bee for the whole semester but I do not know what I have learnt finally.

说起来真的汗颜，一个学期在忙忙碌碌，到最后也不知道自己忙了些什么东西。

My mother is as busy as a bee.

我妈妈像蜜蜂一样忙。

He's as busy as a bee.

他跟蜜蜂一样忙。

So you might say you were as busy as a bee if you spent your weekend cleaning your house.

所以，如果周末你忙着打扫房间，你可以说自己as busy as a bee，像蜜蜂一样，非常忙碌。

I'll be as busy as a bee if I want to finish all my homework before the semester is over.

如果我想要在学期结束之前完成所有的作业，我就会忙的不可开交。

Actually, I'm not so busy as a bee. I just want to take that as an excuse for my laziness.

其实自己也不算忙，这也许只是自己潜意识的下的一个借口而已吧。