岩石钻

The dynamic model reveals the dynamic action of drillstring-bit-rock system. It is instructive to design new rock bit and study drilling mechanics.

本文中建立的动力学模型能较好的描述钻柱—钻头—岩石系统的动态行为，对于新型钻头的设计以及钻井力学研究都有着较好的指导意义。

This new model of drilling machine can bore through solid rock ten metres deep.

这台新型钻机能钻透十米厚的坚固岩石。

Often accompanied by a hanger, an eyelet to which a carabiner can attach.

一种金属器材，通常钉住岩石上预先钻好的洞来作为保护点，上面有洞可以连接快挂、铁锁等。

The advantage of the swirling water jet breaking rock is the heavy breaking efficiency, large breaking area and less energy used to break rock per unite volume, so the swirling water jet can drill in a hole of a large diameter.

旋转射流破岩的优势在于破碎面积大、效率高、破岩比能低，因而旋转水射流能够钻出大直径的岩石孔眼。

When she stole softly to the edge of the lagoon she might see them by the score, especially on Marooners' Rock, where they loved to bask, combing out their hair in a lazy way that quite irritated her; or she might even swim, on tiptoe as it were, to within a yard of them, but then they saw her and dived, probably splashing her with their tails, not by accident, but intentionally.

水面上不时冒出一个脑袋，钢铁的寒光一闪，跟着是一声吼叫，或一声呐喊。在混战中，有的人打了自家人。斯密的开瓶钻捅着了图图的第四根肋骨，他自己又被卷毛刺伤了。远离岩石的地方，斯塔奇正在紧迫斯莱特利和孪生子。这一阵子彼得又在哪儿呢？他在寻找更大的猎物。

Gas drilling ; penetration rate ; rotary drilling ; percussion drilling ; rock breaking

气体钻井；机械钻速；旋转钻井；冲击钻井；岩石破碎

Aimed at the problems, the improvement measures of extracting the modes of drilling speed and operating life of the bit from field data by multiple regression analysis, then, turning the selection index actual value into the corrected...

根据本方法对江汉油田部分地区的钻头使用资料进行计算分析，结果表明，选型结果是合理的，本方法是可行的，文中对钻头选型和钻井参数优选的配合，以及岩石可钻性用于钻头选型等问题也作了一些探讨。

Circulation loss, hole collapse, kicks, drill pipe sticking, high sulfur content, tight and hard rocks, and hole deviation are the problems to be faced, which have restricted the safe, fast and high-quality drilling operations.

受特殊沉积环境及复杂构造运动的影响，在通南巴构造带上钻井工程事故频发，存在井漏、井壁垮塌、井涌、卡钻、高含硫化氢、岩石致密硬度大、井斜等问题，严重影响了安全、优质快速钻井。

In the movie, world governments unite to build a manned craft that can burrow through 2,900 kilometers of solid mantle rock and survive the core's scorching heat—comparable to that at the surface of the sun.

在电影里，全世界的政府联合起来建立了一艘载人进入地心的探测船，它可以钻过2900公里厚的固态地函岩石，并在灼热程度相当于太阳表面的地核中幸存。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。