Constructed of hardened materials with optional hard facing.

有硬化材料构造而成，配置备选硬面。

The results show that hard facing layer have high hardness, anti wear performance and suitability.

结果表明，圆点状堆焊层具有较高的硬度、耐磨性及适用性。

Parents need to understand as hard as it maybe that just as there were bad things when they were growing up, their children are facing the same things.

家长必须明白在他们成长过程中也同样存在坏的事物和影响，今天孩子们面临的困扰和当时并无不同。

Many physical illnesses and medications can cause similar symptoms, and if a patient is facing real hardship, it can be hard to draw the line between appropriate sadness and a clinical problem.

很多身体上的疾病和药物能引起微小的病状，如果病人确实很痛苦，就会很难划清是心情所引起的还是客观病情引起的。

Awesome companies are facing a talent crunch, and finding the most awesome software people out there is hard.

好公司都面临天才荒，很难招到最好的软件工程师。