natural background radiation

常見例句

雙語(yǔ)例句

• This is called natural background radiation.
  這稱為自然環(huán)境輻射。
• The committee said the detected levels of radioactive iodine-131 were below one-hundred-thousandth of natural background radiation and not considered harmful.
  委員會(huì)稱此次檢測(cè)到的碘-131輻射量小于天然本底輻射劑量的十萬(wàn)分之一，不會(huì)對(duì)公眾造成傷害。
• For most people more than half of their natural background radiation dose comes from radon, a radioactive gas that can accumulate in homes, schools and workplaces.
  對(duì)大多數(shù)人來說，他們自然環(huán)境輻射劑量的一半以上來自氡 — 一種可聚集在家庭、學(xué)校和工作場(chǎng)所的放射性氣體。
  www.pdcdc.sh.cn

權(quán)威例句

• Dr. GERBER: It's approximately four times the natural radiation dose that we all receive annually in the Unites States, as a result from background radiation due to radon and other materials.
  NPR: Study: Heart CT Scans May Pose Risk
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