1.
It is about7000 million years old measured by isotope geological method.
假如该坑与上述三个陨石坑是同一系列的外来天体撞击地球事件。
2.
Analysis and Calculation on Collision Breakup Characteristics of Orbital Spacecraft
在轨航天器撞击解体特性分析与计算
3.
The striking of one body against another; collision.
碰击，撞击一个物体对另一个物体的击打；碰撞
4.
First, a single impact cannot raise the global temperature of an asteroid-size body by more than a few degrees.
首先，单一撞击无法使小行星般大小的天体整体温度提升几度。
5.
The striking together of two bodies, especially when noise is produced.
敲打两物体的撞击，尤指能撞出声响时
6.
Zijin Mountain Astronomical Observatory of Nanjing forecasts the specific time to observe the comet's collision with Jupiter from China
南京紫金山天文台预测出中国观测彗星撞击木星的具体时间
7.
The collision of 21 comet nuclei will last for five and a half days.
二十一颗彗核撞击时间持续五天半。
8.
Second, the high surface-to-volume ratios of such bodies promote heat loss, so they cool quickly between successive impacts.
第二，这类天体的表面积对体积比值高，促使散热更快，因此在各次撞击之间会快速冷却。
9.
To rebound after having struck an object or a surface.
跳，反弹撞击物体或物体表面后弹回
10.
Study on the influence of striking bow shape to the side structure during ship collision
撞击船艏部形状对被撞船体舷侧结构碰撞性能影响研究
11.
Development of an Impact Testing Machine and a Relevant Impactive Injury Modeling;
人体撞击性试验机的研制与撞击性损伤模型的建立
12.
The ancient pockmarked surfaces of most of these rocky bodies indicate that high-energy impacts remained frequent for hundreds of millions of years.
大多数这类石质天体，那古老、满瘢痕的表面，显示它们数十亿来持续受到剧烈的撞击。
13.
a rattling sound as of hard things striking together.
类似坚硬的物体互相撞击的卡嗒声。
14.
A decrease in volume causes the molecules to hit the walls more frequently.
减小体积，分子就更加频繁地撞击器壁。
15.
A Visual Experimental Study on a Droplet Impacting onto Solid Surfaces;
液滴撞击固体表面的可视化实验研究
16.
Dynamic Analysis on Impact Response of Vehicle-Pedestrian;
汽车—行人撞击中的人体动力学仿真
17.
Hypervelocity Impact Characteristic Investigation of Spacecraft Space Debris Shield Configuration;
航天器空间碎片防护结构超高速撞击特性研究
18.
Survey on USA Space Weapon Test from Deep Impact Mission to Comet Tempel-Ι
从“深度撞击”试验剖析美国天基武器试验