您要查找的是不是：
- flat grade mine 缓倾斜层矿山
- Bacterial activity in anaerobic wastewater produces hydrogen sulfide gas, particularly in warm climates when sewers are laid on flat grades. 污水中细菌的厌氧活动产生硫化氢气体，尤其在温暖的气候和管道平坦的地方。
- I think your plans will chime in with mine. 我想你的计划会同我的相吻合。
- The man jacked up his car to fix a flat tire. 那人用千斤顶把他的汽车顶起以修理漏气的轮胎。
- Pupils who pass the test will be promoted to the next higher grade. 小学生只要考试及格就会升到高年级。
- It was a freak of mine to wear pink pajamas. 穿上粉红色睡衣是我一时的奇想。
- He stumbled over a stump and fell flat on his face. 他给树桩一绊，摔了个嘴啃泥。
- He spread the map flat out on the floor. 他把地图平铺在地上。
- He's not in the first grade as a musician. 他不是第一流的音乐家。
- Our present lease on the flat expires next month. 我们这套公寓的租约下月到期。
- His opinion differs entirely from mine. 他的意见和我的完全不同。
- Business is now on the up grade. 目前生意蒸蒸日上。
- The flat will be refurbished for the new tenants. 这套房间将重新粉刷以接纳新房客。
- Pupils with 90% or more are awarded Grade A. 满90分的学生评为甲等。
- She is buying a flat close to her office. 她正在购买一套靠近她办公室的单元房。
- She lay flat on her back in the warm sunshine. 她在温暖的阳光下平躺著。
- Success is mine if I stick it out. 只要我坚持到底成功就是我的。
- The lease on our flat runs out in a few months. 我们公寓的租约还有几个月就到期了。
- The colours used are flat and unvaried. 使用的颜色既单调又无层次。
- Griddles are used for cooking flat cakes. 这个浅锅是用来烤蛋糕的。
