查询词典 crater

We made a perfect landing beside a small crater in the Sea of Tranquility.

我们成功地降落在"宁静海"中一个小火山口的边上。

Upon descent, alarms went off telling the astronauts that the automatic guidance system was steering the lander toward a boulder-strewn crater instead of a relatively flat landing site called the Sea of Tranquility.

降落后，警报响起，告诉宇航员自动导航系统在引导登月车驶向布满陨石坑的火山口，而不是去被成为宁静之海的相对平稳的陆地。

The resulting crater later filled with water and became known as Lake Toba.

因此发生的弹坑后填满了水并成为众所周知的Toba湖。

At home in an ancient volcano, a rice farmer eyes a storm above Lake Toba, cupped in a crater on Indonesia's Sumatra.

一位农夫注视着多峇湖上的乌云，多峇湖是位于印度尼西亚苏门答腊岛一座火山坑内的环湖，而这位农夫的家就在这座古老火山上。

The researchers estimate that there also was about a 70% probability that the prominent Tycho crater on the moon, formed 108 million years ago and measuring about 85 kilometres across, was also carved out by a remnant of the earlier asteroid collision.

研究人员估计，月球上著名的第谷陨石坑形成于1.08亿年前，直径约85公里，也是那次较早小行星碰撞造成的。这种可能性为约70%。

The crater"8221; is the volcanic cone crown sunken, the jaw opening passes through the surface.

"火山口"是火山锥顶部的洼陷，开口处通到地表。

A large crater formed by volcanic explosion or by collapse of a volcanic cone.

背单词诀窍，只需每天5分钟饮食娱乐词汇在线语法测试

Glaciers covered by the ancient volcanic cone Mazha Ma volcanic eruption in the late Pleistocene when the broken crater formed by weathering and erosion from water after the expansion.

被冰川覆盖的古火山锥马扎马火山于更新世晚期喷发时形成的破火山口，经风化和侵蚀后扩大积水而成。

No long-term because of volcanic eruption, volcanic gradually weathered, with the deposition of volcanic ash and dust accumulation of mixed and formed a rich in potassium, phosphorus and other elements of the fertile soil, coupled with more rainfall here, the crater of a south-easterly direction there are gaps, and the sun can radio Income, so long played a lush forest.

由于火山长期没有喷发，火山岩逐渐风化，同火山灰及沉积的浮尘积聚混合，形成了富含钾、磷等元素的肥沃土壤，加上这里降水较多，火山口的东南方向有缺口，阳光可以射入，所以长起了郁郁葱葱的森林。

This study shows that there are 4 kinds of volcanic facies in deep volcanics in north Songliao Basin: eruptive facies, overflow facies, volcanic vent facies and volcanic sedimentary facies. There are 4 volcanic eruption cycles: Huoshiling period, Shahezi period, Yingchengzi period and Quantou period. There are 4 structural evolution stages: north-south accumulation, west-east subduction, uplift mantle and thin crust, alternative open and close. There are 4 kinds of pool-forming patterns:(1) pattern with the migration along the unconformity and fault to the near crater;(2) pattern with the migration along unconformity and fault to the rift margin;(3) pattern with the migration along unconformity, fault and fracture to the source rock;(4) pattern with the migration of the deep gas along the deep and large fault to the volcanic trap.

研究认为，松辽盆地北部深层火山岩主要存在四种火山岩相：即爆发相、溢流相、火山通道相、火山沉积相，划分为四个火山喷发旋回：即火石岭期、沙河子期、营城子期、泉头期，经历了四个构造演化过程：即南北夹攻、东西俯冲、幔隆壳薄、开合交替，具有四种成藏模式：即沿不整合面和断层运移至近火山口处火山岩圈闭聚集成藏模式、沿不整合面和断层砂岩疏导层运移至断陷边部火山岩圈闭聚集成藏模式、沿不整合面及断层、裂缝运移至源岩区内凹中隆火山岩圈闭聚集成藏模式、深部无机成因天然气沿深大断裂运移至火山岩圈闭聚集成藏模式。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。