1.
The bad news is that forecasting asteroid impacts remains a tricky business.
坏消息是预测小行星撞击不是件容易事。
2.
This station's planet experts also attended many international scientific seminars on the dangers of comets and asteroids colliding with Earth.
该台行星专家还多次参加关于彗星、小行星撞击地球危险性的国际学术讨论会。
3.
Water flowed only briefly in the past, they posit, when asteroids crashing into Mars billions of years ago unleashed scalding rains for decades at a time.
数十亿年前小行星撞击火星，造成为期数十年的滚烫大雨，火星仅在此小段时间曾经有水流动。
4.
Alvarez proposed that an asteroid estimated at over 1 00km in width struck the earth off the coast of the modem day Yucatan peninsula.
阿尔瓦雷茨提出一颗直径约100千米的小行星撞击了现在的尤卡坦半岛。
5.
The only remaining viable alternative is the heat produced when asteroids collide with one another.
剩下唯一的选择，是小行星彼此撞击产生的热。
6.
Small meteorites have left impact craters all over the planet’s surface.
这个行星的表面布满了小块陨石留下的撞击坑。
7.
Meteoroids or other space rocks smashed into the newly-forming planets and moons.
陨石或者其它太空岩石猛裂撞击形成不久的行星和卫星。
8.
Thus, astronomers can determine an asteroid's orbit sooner, predicting whether it will hit the Earth or not.
这样天文学家才能尽快确定小行星的轨道，预测它是否会撞击地球。
9.
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。
10.
When planets are bombarded by asteroids or comets,
当星球被陨石或彗星连续撞击时，
11.
China Builds Up Jupiter Comet Collision Observation Network
中国建立彗星撞击木星观测网
12.
In July 1994, the Comet Shoemaker -Levy collided with Jupiter.
1994年7月，慧星“皮鞋匠”——利维撞击了木星。
13.
When the impact happened, the dark matter in the clusters also collided.
当撞击发生时，星团中的暗物质也发生碰撞。
14.
Many physicists suspect the Earth suffered a direct hit from an asteroid or that a comet could be to blame for the extinction.
许多物理学家推测，造成恐龙灭绝的原因可能是当时地球遭到一颗小行星或彗星的撞击。
15.
Two galaxies have obviously just collided.
两个星系显然是撞击过了。
16.
the bump threw him off the bicycle.
彗星在撞击中破裂成碎片。
17.
impact ionization detector
撞击电离式微流星探测器
18.
To strike(a passing bicyclist, for example)by suddenly opening a vehicular door.
突然撞击突然打开车门撞击（路过骑自行车者等）