He started keeping tracks of sunspots, mapping them, so he wouldn't confuse them with any potential new planet.

他开始追踪太阳黑子，标注它们的位置，这样就不会把它们和任何潜在的新行星混淆了。

youdao

The tracks of the large animal were clearly printed in the sand.

这只大动物的足迹清晰地印在沙滩上。

《牛津词典》

We were walking along the bank of the Niger river, searching for the tracks of a hippopotamus that was ravaging the corn on Karim's farm.

我们沿着尼日尔河岸走着，寻找一头河马的足迹，它毁坏克莱姆村农场农作物。

youdao

NASCAR races generally use oval shaped tracks of different lengths that require turns to the left.

VOA: special.2009.04.10

the act of actually pushing someone over onto the tracks and killing him, you are actually killing him yourself.

真的动手把人推到轨道上让他死的这种行为，就等于是你亲手杀了他。

耶鲁公开课 - 公正课程节选

A boy and a girl fell in love from the wrong sides of the tracks The families were upset so they tossed the boy and the girl into two different constellations, thinking that they would never meet again.

男孩爱上了本不该相爱的女孩,双方家庭很生气，所以他们把,这对恋人分开到两个不同星座上，认为这样他们就不会再见面了。

麻省理工公开课 - 媒体、教育、市场课程节选

Patented Track Zero to hide extra tracks of music, liner notes on CDs and DVDs.

FORBES: Proving their net worth

As a bonus, squishy lake-edge sediments are just the things for recording the tracks of passing animals.

ECONOMIST: The rise of the dinosaurs

The company and its merchants have accurate tracks of precisely how much beer they sell in each store.

FORBES: How Walmart and Heineken Will Use Shopperception to Put Your In-store Experience in Context