正如我们所说，科学家正在试验努力寻找让种子的生命力更加延长的方法。Scientists are experimenting to find ways to ensure the viability of seeds for even longer periods of time.也许我能拿到延长的绳路把自己挂起来.Maybe I can get an extension cord and hang myself.目的:本研究是确定非住院...
造船中使用的金属板过去使用铆接, 现在则常用焊接.The metal plates used in making ships used to be riveted together, but now they are usually welded.他们把钢梁铆接在一起.They riveted the steel beams together.用于修补与加强焊缝、铆接 、 切割等作业造成的防护层损伤.Use to fix up and ...