您要查找的是不是：
- Low grade tin ore 低品位锡矿
- A low number; a low grade of oil. 一个小的数; 低级油
- John is down on his teacher because she gave him a low grade. 约翰恨他的导师，因为她给他打了低分。
- My son mucked up the car engine by using cheap, low grade gasoline. 我的儿子使用便宜的低级汽油,汽车引擎损坏了。
- Tin ore iron ore and minerals processing, marketing. 铁矿及其伴生锡矿加工，销售。
- It's a mid scale and its ore belongs to low grade structural altereds tyle, limonite, pyrite are mainly gold carriers. 矿石以低品位构造蚀变岩型为主,褐铁矿、铁矿是主要的载金矿物。
- Low grades are getting Hellen down. 低分数使海伦闷闷不乐。
- A light yellow,red-brown,or black mineral,SnO2,that is an important tin ore. 锡石一种淡黄色、红褐色或黑色的矿物，SnO2，是一种重要的锡矿。
- He is a bit let down by the low grade he got. 这次成绩不好, 他有点气馁。
- Low grades are get ting Helen down. 考分很低使海纶闷闷不乐。
- China's imports from India more Goa India from low grade iron ore, rather than high-grade iron ore. 中国从印度进口的更多的是产自印度Goa的品位较低的铁矿石，而不是高品位铁矿石。
- The research is useful exploration for similar low grade ore pre-processing of demestic dilution type mine. 该研究对我国类似资源贫化型矿山低品位矿石的预选是一个有益的探索。
- This thesis will discuss the extractable grade of low grade ore according the production state of Jintingling Mining CO,ltd. 就金亭岭矿业有限公司生产现状,对低品位矿石的可回收品位进行了探讨。
- A light yellow, red-brown, or black mineral, SnO2, that is an important tin ore. 锡石一种淡黄色、红褐色或黑色的矿物，sno2，是一种重要的锡矿
- Tin ore, copper, zinc mine, iron ore, snake bite mine, silica, sand and gravel sales. 锡矿、铜矿、锌矿、铁矿、蛇纹矿、硅石、砂石购销。
- The ore structure of Daling Mine is complex in Jilin Nickel Industry Corporation, it is typical low grade difficulty mining deposit. 吉林镍业公司大岭矿矿岩结构复杂，为典型的低品位难采矿床。
- Tin ore, iron ore, copper, gold, serpentine, granite, artificial stones processing, wood products marketing. 锡矿、铁矿、铜矿、铅锌矿、蛇纹石、花岗岩、人造宝石加工、竹木制品购销。
- My son muck up the car engine by using cheap, low grade gasoline. 我的儿子使用便宜的低级汽油,汽车引擎损坏了。
- Cassiterite has been an important tin ore for eons and is still the greatest source of tin today. 锡石作为一种重要的锡矿石已有数十亿年的历史，时至今日仍然是锡的重要来源。
- The teacher remonstrated with the boy about his low grade. 教师告诫男孩,说他的分数太低了。
