Modern airplanes have two black boxes: a voice recorder, which tracks pilots' conversations,and a flight-data recorder, which monitors fuel levels, engine noises and other operating functions that help investigators reconstruct the aircraft's final moments.

出自-2010年6月阅读原文

The train was coming around the corner as I lifted the baby from the tracks.

2016年12月四级真题（第二套）听力 Section B

The wind blew the baby onto the tracks.

2016年12月四级真题（第二套）听力 Section B

The music service This Is My Jam helps people navigate the tens of millions of tracks now available instantly via Spotify and iTunes.

出自-2013年12月阅读原文

Journalist Sarah Scoles reports that NASA currently tracks about 24,000 objects in space, and in 2016 the air Force had to issue 3,995,874 warnings to satellite owners alerting them to a potential nearby threat from another satellite or bit of debris.

2019年6月六级真题（第二套）阅读 Section C

But unlike most collectors, Zac tracks down the medals' rightful owners, and returns them.

2019年高考英语浙江卷 阅读理解 阅读A 原文

He followed his tracks and returned to the snow cave, because without shelter, he could die that night.

2015年高考英语北京卷 阅读理解 阅读A 原文

Others absorb light, stopping it dead in its tracks.

2015年高考英语北京卷 阅读理解 阅读C 原文

The evening walk was a time to shake off the day's upsets and let the worry tracks in my head go to white noise.

2015年高考英语浙江卷 阅读理解 阅读D 原文

But brain researchers have discovered that when we consciously develop new habits, we create parallel paths, and even entirely new brain cells, that can jump our trains of thought onto new, innovative tracks.

2009年考研真题（英语一）阅读理解 Section Ⅱ

For example, even in dense forest, you should be able to spot gaps in the tree line due to roads, train tracks, and other paths people carve through the woods.

2019年考研真题（英语一）完形填空 Section Ⅰ

Trail blazes, tire tracks, and other features can lead you to civilization.

2019年考研真题（英语一）完形填空 Section Ⅰ