This method was very effective as the glass had not touched any surfaces between being soft and becoming hard, so it stayed perfectly unblemished, with a "fire finish".

这个方法非常有效，因为玻璃在从软变硬的过程中并没有触及任何物体的表面，因而在经过“火抛光”处理后能保持完美无瑕。

youdao

youdao

You'll be hard pushed to finish this today.

要你今天做完这件事会很难。

《牛津词典》

Three hours of cooking make a beet impressively luxuriant and sugary, but the dish is hard to finish.

NEWYORKER: Aska

Its been very hectic here all day with a roving reporters working hard to finish their radio show!

BBC: School Report Shout Out Wall

The stock was up more than 3% in the morning, but reversed hard to finish the day down 3.4%.

FORBES: Rally Gets A Rest As Apple And Google Slip A Bit