youdao

While most meteorites are natural in origin, on occasion manmade space debris can reenter the atmosphere and also become a meteor or even a meteorite!

尽管大多数陨石都是天然形成的，但也有少数人造天体会落入大气层，变成流星，甚至是“陨石”！

youdao

In these situations, you have to be more cautious about concluding a feature is manmade oil.

在这种情况下，你必须更加谨慎地来判断某些特征是否是人造石油的。

youdao

He and his research team have developed a synthetic,or manmade, cell he calls "Synthia."

VOA: special.2010.07.20

A blue-gray haze from natural and now manmade sources hangs over them like smoke.

VOA: special.2009.09.28

Pieces of a manmade inflatable raft and a still-usable lifejacket, from glued-together rubber raincoats, were found on nearby Angel Island.

FORBES: Escape From Alcatraz Redux

Perched atop craggy cliffs over the deep blue waters of Rincon Bay, I arrived at what looked like a manmade stone wall surrounding a cluster of huts.

BBC: Lodges Robinson Crusoe would love

After warming up in a Finnish sauna -- a national tradition -- guests don socks for a 50m, often naked run through the snow to a manmade hole in the ice, where they can safely use a step ladder to dip in the icy lake waters below.

BBC: Finland��s native S��mi adventures