This product uses the advanced fever to make the technology, use liquid gas reducing flame hard fire, is the ideal environmental protection product.

该产品采用先进烧造技术， 利用液化气还原焰高温烧成，是理想的环保产品。

youdao

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

The snag is that unprofitable companies, which should have been squeezed out by competition, have remained alive because it is so hard to fire workers.

问题在于，那些本应被竞争挤出市场的无利可图的公司，却因为裁员如此之难而存活了下来。

youdao

Clay becomes very hard when it is put in a fire or a special oven called a kiln.

VOA: special.2009.01.12

If you squeeze the trigger of a gun really hard and really fast, it doesn't fire any faster or harder than if you just squeezed it gently.

快速有力地扣动扳机,并不比你轻扣扳机,射出的更加快速或更加有力

耶鲁公开课 - 心理学导论课程节选

South African labour laws make it hard to fire workers, which deters companies from hiring them in the first place.

ECONOMIST: Schumpeter

One sign of greater labour-market flexibility is that companies are bypassing stringent job-protection laws that make it hard to fire workers.

ECONOMIST: Growth and jobs

The snag is that unprofitable companies, which should have been squeezed out by competition, have remained alive because it is so hard to fire workers.

ECONOMIST: India's economy