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- The layer's fast formation dues to the boracic atom's fast diffusion. 渗层的快速形成主要是硼原子在渗层中快速扩散的结果。
- A method for measurement of tissue optical properties by timeresolved reflectance was improved, i.e.the contribution of the absorption coefficient to diffusion constant was considered. 通过考虑吸收系数对漫射常数的影响，改进了时间分辨反射中两点测量生物组织光学性质的方法。
- He worked very fast, insomuch that he was through in an hour. 他工作得很快，一小时内便做完了。
- He's not a fast horse but he's certainly a stayer. 这匹马跑得不快，但很有耐力。
- Clouds cause the diffusion of light from the sun. 云使阳光漫射。
- Bind the rope fast lest it should come loose. 把绳子绑牢，免得它松脱。
- Bill has a feeling he is on a fast track. 比尔感觉到他正快速迈向成功。
- A car journey is as fast as a train journey. 乘汽车旅行跟乘火车旅行一样快。
- A car overtook me although I was going very fast. 我虽然开得很快，还是被一辆汽车超前了。
- I must be at Hudson before I break my fast. 吃早饭之前，我肯定已到哈得逊区。
- Let's walk fast in order to keep warm. I'm cold. 咱们快些吧，以保持身体暖和。我感到冷。
- I can move very fast across the ice on skates. 我穿着冰鞋在冰上滑得很快。
- He ran fast enough to catch the thief. 他跑得飞快，足以抓住那小偷。
- apparent diffusion constant 表观扩散常数
- He stuck hard and fast to his principles. 他坚定不移地坚持自己的准则。
- His head was stuck fast in the railings. 他的头卡在栅栏里动弹不得。
- free flight diffusion constant 自由飞行扩散常数
- His wife admonished him not to drive too fast. 他的妻子警告他开车不要超速。
- rotatory diffusion constant 转动扩散常数
