Long-term recruitment of trainees, including the teaching package will be, without material cost, work may be taken away by themselves.
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"So what we have done without any loss of efficiency is to replace expensive and highly toxic material with one that is completely benign and much lower cost in the process," Major said.
“所以，我们完全可以用一种完全良性而且成本低得多的物质来取代这种昂贵且带有剧毒的原料，而且无需承受任何效率损失，”梅杰说。
C, this series of products work with air as raw material, without other raw and auxiliary materials, the use of low cost.
本系列产品工作时使用空气作为原材料，无需其他原辅材料，使用成本低廉。
The material cost, without engine and instruments, is about 6000 euro, at the 2007 prices.
材料成本，没有引擎和文书，是关于六〇〇〇欧元，在2007年的价格。
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