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- F PR is the ratio of the time needed for a CDG and a polymer solution of equal polymer concentration to flow out through a sand pack and expresses the relative strength of the CDG in porous media. 孔隙阻力因子FPR为相同聚合物浓度的CDG和HPAM溶液分别流过填砂滤层所需的时间之比 ,可代表CDG在多孔介质中的相对强度。
- Using the sand pack model, the percolation features of low permeability cores with various clay minerals and different proportions of clays are studied under different fluid injection patterns. 通过室内填砂管渗流实验,研究了不同粘土类型、不同粘土比例的低渗透岩心在不同流体注入方式下的渗流特性,并根据实验结果分析了其渗流机理。
- Oolite lime sand packs naturally with 40% porosity because the particles are essentially spheroids. 自然堆积的灰质鲕粒砂具有40%25的孔隙度，因为其颗粒其本上都是球状的。
- Let's pack up and spend a week in the countryside. 咱们收拾好东西到乡下去过一个星期吧。
- The climber fell from a great height. 攀登者从极高的地方坠落下来。
- Ouch! The sand is so hot! I can burn my feet. 哎哟！沙子这么烫！会烫伤脚的。
- How would you pack the goods we have ordered? 我们订购的这批货，不知你们是怎么包装的？
- He used to smoke a pack of cigarette a day. 他过去经常一天抽一包香烟。
- The sand blew into the food and made it gritty. 砂吹进食物中，里边尽是砂子。
- The twins are unequal in height. 这一对孪生儿高矮不一样。
- We leave tomorrow but I haven't begun to pack yet! 我们明天动身，但我现在还没开始收拾行李呢！
- The ship was nosing a way through the ice pack. 轮船小心地通过大块浮冰。
- The children were playing in the sand pit. 孩子们在沙坑中玩耍。
- Don't forget to pack your toothbrush! 别忘了把牙刷放到箱子里去！
- From a precipitous height we look at the town spread out below. 我们从险峻的高处眺望铺展在下面的城镇。
- The tractor has make deep furrow in the loose sand. 曳引机在松软的沙土上留下了深深的车辙。
- The total height is put at390 feet. 整个高度估计为390英尺。
- The sun blazed down on the sand. 阳光强烈地晒在沙滩上。
- She can see over the wall because of her height. 她个子高，能看到墙的那一边。
- They went hunting with a pack of hounds. 他们带一群猎狗去打猎。
