The Martians had caIcuIated their descent with amazing perfection.是什么意思？

The Martians had caIcuIated their descent with amazing perfection.

火星人对他们的降落点做过精确的计算.

the

art. 指已提到的人（物），指说话人与听者已知的人（物），用于独一无二的事物前，与形容词最高级和序数词连用；

例句
He did have a real knowledge of the country...
他对该国的确知之甚多。

Martians

n. 火星人( Martian的名词复数 )；

例句
The Martians had caIcuIated their descent with amazing perfection.
火星人对他们的降落点做过精确的计算.

had

v. 有（ have的过去式和过去分词 ），（亲属关系中）接受，拿，买到；

例句
He claimed that his parents had abandoned him...
他声称父母遗弃了他。

their

pron. 他（她，它）们的，在提及性别不详的人时，用以代替 him 或 her；

例句
Their permissiveness toward their children reflects the wild abandon of their own lives.
他们对孩子的放任折射出他们自身生活的放浪形骸。

descent

n. 下降，血统，倾斜；

例句
Sixteen of the youngsters set off for help, but during the descent three collapsed in the cold and rain.
16 名年轻人出发去寻求帮助，但在下山过程中有 3 人因寒冷和大雨晕倒了。

with

prep. 和，跟，随着，关于，和…一致；

例句
A waiter entered with a tray...
侍者端着托盘进来了。

amazing

adj. 令人惊异的；vt. 使大为吃惊，使惊奇( amaze的现在分词)，使惊异：感到非常好奇；n. 吃惊，好奇；

例句
It's amazing what we can remember with a little prompting...
稍加提醒我们就能想起很多东西，真是让人惊奇。

perfection

n. 完美，完善，最后加工，圆满；

例句
It is unrealistic to believe perfection is an attainable goal.
相信完美可以企及是不现实的。