The bit is usually a drag bit fitted with either PDC or natural diamond cutting structures, but the core bit is unusual in that it has a hole in its center.
钻头通常属于刮刀型，装备有PDC或者天然金刚石切削齿，但取芯钻头的特别之处在于钻头中心有一孔。
Based on the theoretical analysis, a new type of blade bit was invented. And this kind of bit combines the advantages of PDC bits and drag bits. And a series of field experiments were performed.
在理论分析的基础上，综合PD C钻头和刮刀钻头的优点，设计了一种新型的刮刀钻头，并进行了现场试验。
And just as their long, heavy trains pose a burden to peacocks, the extravagant feathers of Anchiornis may have been a bit of a drag, literally.
对于雄孔雀来说，硕长且沉重的尾屏是个沉重的负担，而过多的羽毛可能也同样拖累了近鸟龙。
Not only do they save a bit of development time, but they also provide a consistent approach that works well in the presence of other handlers-even other click-and-drag handlers.
它们不仅节省了大量的开发时间，而且提供了一种一致的方法，这种方法同样适合于其他处理程序—甚至适合其他点击-拖动处理程序。
This section contains a lot of small functions, each of which takes care of a bit of the annoying boilerplate that usually comes with implementing drag-and-drop functions.
本节包含很多小函数，每个函数负责在实现拖放功能时处理一些烦人的重复工作。
In the working example, move the slider pointer at the top of the display a bit to the right (that is, grab it with your mouse pointer, drag it over, then release the first button).
在实际例子中，将显示器顶部的滑块指针稍微向右移动一点(就是将鼠标指针放在它上面，按下鼠标左键拖动，然后释放鼠标左键)。
Female fat tends to be disproportionately distributed in the lower half of the body, giving a bit more lift to the legs which in turn reduces body drag.
女性的脂肪在身体的分别并不平均，在身体的下半部分更多一些，这使得她们的腿浮得更高，减少了身体的拖动。
IMF economists trimmed their projection for global growth a bit, partly because of the drag in the us from the immediate budget cuts under sequestration.
国际货币基金组织的经济学家下调了全球经济增长的预测值，部分原因是美国因自动减支计划而立即削减预算的举措拖累了经济。
You realize you've been a bit obsessive and you feel it's time to apologize to your non-fandom friends for trying to drag them into it.
你意识到自己过于着迷了，感到要向非花痴朋友们道歉，因为你总是试着把他们“拉下水”。
You realize you've been a bit obsessive and you feel it's time to apologize to your non-fandom friends for trying to drag them into it.
你意识到自己过于着迷了，感到要向非花痴朋友们道歉，因为你总是试着把他们“拉下水”。
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