找到一种植物,[辨别它的确切用途]然后申请专利并制成药物所需要的平均时间是十到十五年,[所以]这是一项长期投资。
Ten to fifteen years is the average time between finding the plant, [identifying its exact use] and patenting it into a drug [so] it is a long-term investment.
十五分钟后,飞机通过自动电文报告电路故障,然后联系就中断了。
Fifteen minutes later the aircraft reported electrical faults through an automated message. Then contact was lost.
他告诉我他支持我当医生的选择,并建议我可以离开公司十五天去准备考试,然后再回公司上班直到我找到新工作。
He told me that he supported my choice to be a doctor. He suggested me that I can leave about fifteen days to prepare my examination, and then go back company to work until I find a new job.
So, initially they came up with four lines and then eventually five and even six, and then they went back to five by the fifteenth century.
那么,他们最初提出的是四条线,但是最终却是五条线,甚至六条线,然后在十五世纪又回到了五条线
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