Then, exposure conditions including the exposure dose and source to film distance were changed to find the optimal one.

改变源片距离和曝光剂量，进一步突出所能发现的误差，确定最佳曝光条件；

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'Chocolate is a concentrated source of calories, so it's important to keep the dose within therapeutic range,' he says.

他称，“巧克力含热量高，所以将摄入量控制在对健康有益的范围内是很重要的。”

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Analysis and evaluation were carried out on the safety grade of the radiation source, radiation prevention site and the exposure dose level of the working staff.

方法通过现场监测，按照标准对辐射源安全级别，场所辐射防护区域，工作人员接受的剂量水平进行分析评价。

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The light source provides eight hours of electricity per dose of saline water, and the lantern comes with a dedicated water bag for mixing the solution.

ENGADGET: Green House's lantern runs on salt and water, powers your gadgets via USB

"Chocolate is a concentrated source of calories, so it's important to keep the dose within therapeutic range, " he says.

WSJ: Heart-Healthy Chocolate: Dark and Bitter Treat

According to Huffnagle, the best source of Lactobacillus and Bifidobacteria probiotics is probably refrigerated supplements, which provide a more concentrated dose and a reliable delivery system.

CNN: Can supplements block benefits of probiotics?