With fertilizer prices jumping nearly 50% per metric ton over the last year in some places, human waste is an attractive, and often necessary, alternative.
We just had installed a new 12-ton cooling unit inthe lab.
最近我们在实验室安装了一个新的12吨冷却单元。
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Steel workers in Louisiana began building the nearly 70-ton cap inthe days after the leak was discovered at the site of a damaged well that had been connected to an oil rig.