1.stiffer a.更硬的

The needle catching problem is an old issue that we have ameliorated with stiffer needles and an improved corner cutting procedure, but it hasn't been fully solved, apparently.
针头抓紧的问题是个老问题了，我们用更硬的针头改善并改进了切割步骤，显然还没有完全解决。

2.endure v.忍耐；持久

I could not endure the insolence of his behaviour.
我不能再忍受他那傲慢无礼的行为了。

3.material n.材料；原料；素材

The colour in this silk material will not fade.
这种绸布料子不会褪色。

4.engineer n.工程师

Hs is a civil engineer.
他是位土木工程师。

5.graduate n.毕业生

They graduate 30,000 engineers every year.
每年有3万名工程师从学校毕业。