阶梯式丝锥
He took a step forward just as the tap-tapping blind man passed him by.
他向前迈出了一步,刚好碰到那位盲丐经过.
The next step is to tap the large market for consumer goods.
下一步是开发庞大的消费品市场。
Step two, I tap this flint with a rock and
第二步用打火石互相碰撞然后
In addition, adopting the four step rule annunciated by American Academy of Science ( AAS), the residual aluminum ions of the tap water in Xi'an City were studied for the Chemical health and harm risk assessment.
此外,论文采用美国科学院(NAS)公布的四步法,对西安市自来水中残余铝离子进行了化学物质的健康危害风险评价。
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