The U.S. Geological Survey says nine species of pythons, atype of snake that can range from 12 to 28 feet in length, pose amedium- to high-risk threat to ecosystem health.
美国地质调查局称，九种蟒蛇——长度从12英尺至28英尺不等的蛇，对生态系统的健康形成中度至高度风险的威胁。
This paper mainly presents the application of the CPMIA-20CDR-AType programmable controller, one of the OMRON series products, in hydrogendryer, an accessory of hydrogen production device.
着重论述了欧姆龙（OMRON）系列产品“CPMIA-20CDR-A型可编程序控制器”在制氢配套产品干燥器上的应用。
When these cells are called to activeduty, their extracellular armor is marked with an immune checkpoint protein, atype of "off" switch called PD1 that can be used to shut down the immuneresponse.
当这些细胞被激活，它们表面会标记一种免疫检查点蛋白，称为PD1，是“关闭”开关的一种，能够关闭免疫应答。
When these cells are called to activeduty, their extracellular armor is marked with an immune checkpoint protein, atype of "off" switch called PD1 that can be used to shut down the immuneresponse.
当这些细胞被激活，它们表面会标记一种免疫检查点蛋白，称为PD1，是“关闭”开关的一种，能够关闭免疫应答。
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