planetarna putanja

planetarna putanja

The path of one object about another (used here for an object orbiting the sun).

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Ključna putanja

商务服务; 项目管理

Generally, but not always, the sequence of schedule activities that determines the duration of the project. Generally, it is the longest path through the project. However, a ...

zenit

天文学; 普通天文学

The point directly overhead in the sky.

meteori

天文学; 普通天文学

Small rocky and/or icy particles that are swept up by the earth in its orbit about the sun. Also called "shooting stars", they travel across the sky in a very short time, from ...

kometa

天文学; 普通天文学

A celestial body orbiting the sun (though some may be ejected from the solar system by planetary perturbations) that displays (at least during a portion of its orbit) some ...

alhemija

天文学; 普通天文学

Art of bringing parts of the universe to the perfect state toward which they were thought to aspire - e.g., gold for metals, immortality for human beings.

aluminij

天文学; 普通天文学

a silvery ductile metallic element found primarily in bauxite.

amper

天文学; 普通天文学

1) Unit of electric current. "The ampere is that constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular ...

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行业/领域：生物学类别海洋生物学

Danionella dracula

a new species of fish discovered in the Mekong River region in 2009. The Dracula fish is so named because it has two fangs at the front of its top ...