“延长的”用英语怎么说？

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...