1.a short, fast, and forceful breath
1.to pant or struggle for breath from exertion
1.It is discovered through experiment that treating PECHs with different relative molecular mass should use different extraction solvents.
实验表明，处理不同相对分子质量的PECH，应采用不同的萃取溶剂。
2.The hydroxy value of hydroxy-terminated polyepichlorohydrin (PECH) is a very important index which influences many properties of PECH.
端羟基聚环氧氯丙烷（PECH）的羟值是影响其性质的重要指标。
3.The results demonstrated that PECH-DMA could greatly enhance the removal efficiency of NTU and organic substances.
结果表明：助凝效果明显，浊度和有机物的去除效果都得到明显提高。
4.Pech Valley, Afghanistan: As darkness falls a US soldier smokes a cigarette before getting into his armored vehicle for a night patrol
佩赫谷，阿富汗：夜幕降临，一个美国士兵在进入装甲车夜巡前吸烟。
5.Experimental Study on Sedimentation Water Quality Improvement in Pech-David Water Plant in Toulouse in France
改善法国图卢兹自来水厂沉淀池出水水质的实验研究
6.A Study on the Modification of Cellulosic Fibers with Low Molecular Weight and Moderate Nitrogen Content of PECH-amine
低分子量、含氮量适中的聚环氧氯丙烷胺化物对纤维素纤维改性工艺的研究