The reactions are typically carried out on a regulated heating block, or PCR machine, and consist of 30-35 cycles of repeated amplification of all the DNA present.

这一反应通常是在一可调控的温箱中或PCR仪中进行，对所有的DNA进行30到35个循环扩增。

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The experiment result showed that sinusoidal tube can effectively inhibit second order harmonic mode, increase first order pressure amplitude and lower down heating block temperature.

在一定加热功率下，正弦管能有效抑制系统产生的二阶谐波，提高一阶压力波动幅值并降低加热块温度。

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You started your career of service as a community organizer and now we are hearing from people like -- organizations like the CBC is saying rebuilding our economy on the backs of the most vulnerable Americans is something that is simply not acceptable, like the cuts to the Community Service Block Grants, Pell Grants, heating oil assistance, and freezing salaries of federal workers.

WHITEHOUSE: Presidential Press Conference on the 2012 Budget