He finished his homework although it is difficult.

虽然作业难做，他还是完成了。

youdao

I would consider myself a mediocre shooter , although it is difficult to measure without other shooters around.

我认为自己是个很普通的射手，虽然和周围的其他爱好者比较高下是困难的。

youdao

Hopefully this is not a one-off in terms of quality although it is difficult to think you will get so many quality goals like that again.

虽然很难想象会再次得到这么多高质量的进球，但非常有希望的是这不会是跟一次性有关的质量。

youdao

Although it is inevitably slower and more difficult than any of us would wish, we are mobilizing all resources as fast as we possibly can."

VOA: special.2010.01.16

The drug certainly seems to work in at least some patients, although it is difficult to predict who will benefit.

FORBES: AstraZeneca's Big Green Light

There are suggestions that unemployment can even lead to cardiovascular disease, although it is difficult to prove that job loss causes heart damage.

CNN: Unemployment takes tough mental toll

Renal cell carcinoma accounts for approximately 2% of all cancers diagnosed in the UK, although it is difficult to treat, with a cure rate of about a third.

BBC: Regular painkiller use linked to cancer