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- four blade perforating bur 四刃穿孔钻头
- The subassembly can have two blades, three blades, four blades or five blades or more. 刀片组分为两刀、三刀、四刀、甚至五刀以上。
- Doctors give her two weeks to live, and then, on top of everything, a tornado comes in and it blows the roof off the house and it 20)impales four blades of grass in her side. 医生说她只能活两个星期了，这时，一股龙卷风刮了进来，它掀掉屋顶，四片草叶子刺到她的身上。
- armor plate blade perforating femoral head and going into one case's hip bone;one is infected after the operation;2 are coax vara; 故对于年龄较大，骨质疏松较明显的病人，术前应测量骨密度，并酌情给予必要的药物治疗。
- perforating bur 穿孔钻头
- It is clear to all of us that two plus two is four. 二加二等于四对我们大家都很清楚。
- He wove four plots together into a novel. 他把四条情节编成一部小说。
- We have tea at four o'clock in the afternoon. 我们在下午四点钟喝茶。
- The town boasts four swimming pools. 这座城镇以拥有四个游泳池而自豪。
- Our football team won by four goals to nil. 我们的足球队以四比零取胜。
- He lay back and hit the ball for four. 他向后弯身击中球，得了4分。
- I was clean broke in less than four days. 不到四天我就一个钱也没有了。
- I'll look out for you at about four. 我4点钟左右找你。
- He showed us four case studies of disturbed girls. 他给我们看了4位精神失常姑娘的病历。
- My house is four miles distance from the sea. 我家离海四英里。
- Our team beat them hollow by four clear goals. 我们队以净胜4分彻底击败了他们。
- The leap year comes around once in four years. 每四年有一个闰年。
- The soldiers counted off from the left by four. 士兵们从左起四个一组大声报数。
- He wooed four girls before finally marrying one. 他在结婚之前曾向四个姑娘求过婚。
- Four avenues radiate from the square. 四条林荫大道从那广场向四方延伸。
