初步研究表明，这类裂缝型受体不仅对中性小分子具有优良的识别性能，而且对D/L氨基酸甲酯具有良好的手性识别能力。
The preliminary results indicate that these molecular clefts not only recognize neutral molecules, but also show good enantio selectivity for D/L amino acid methyl esters.
然而在油藏开发实践和理论研究中，大多习惯性地将对常规油藏注气开采中分子扩散作用的认识沿用到裂缝性油藏注气开发中，即认为分子扩散可以忽略。
But in practice or theoretical studies, most people follow a wrong opinion that for a fractured reservoir molecular diffusion is negligible during gas injection as for a non-fractured reservoir.
对于一口特定的井，经营者需要最大程度提高支撑剂用量，并减少压裂液中大分子物质引起的裂缝面损害。
For a particular well, an operator needed to maximize the proppant amount per foot of lateral while reducing the fracture face damage caused by polymer presence in the fracturing fluid.
剪切带的出现和由此引起微裂缝的发生是PET纤维拉伸形变的主要特征，而个别大分子束的断裂形成裂缝的广泛出现则是PAN纤维的主要特征。
It is the characteristic of the deformation of PET fibers that the shear bands occur and lead to the crack initiation during the process of the deformation.
剪切带的出现和由此引起微裂缝的发生是PET纤维拉伸形变的主要特征，而个别大分子束的断裂形成裂缝的广泛出现则是PAN纤维的主要特征。
It is the characteristic of the deformation of PET fibers that the shear bands occur and lead to the crack initiation during the process of the deformation.
应用推荐