The researchers began by making samples of one or two monolayers of PbSe quantum dots deposited on flat single-crystalline TiO2.

研究人员首先在单晶体 TiO2 平面上制作一层或两层的单分子硒化铅量子点。

youdao

Well, a sledge sliding on flat ice.

我们再来看下雪橇在光滑冰面上滑行的例子。

youdao

I usually live on flat, open plains. But I also can live up in the mountains of South Africa.

我通常住在平坦、空旷的草原上，但我也能住在南非的山上。

youdao

Then they rubbed the clothes on flat pieces of wood, squeezed out the water and hung each piece to dry.

VOA: special.2010.03.28

Probably never that easy but really, you're just not going to lose, and the truth of the matter is that hoplites beat non-hoplites in all battles that are fought on flat land in battles that the Greeks fight in.

也许不是那么的容易,不过总会胜利的,事实上,在所有希腊人打的平原战中,方阵部队无一例外地击败了非方阵部队

耶鲁公开课 - 古希腊历史简介课程节选

This is, you see, also on 2 at the beginning here: I went to the cold-water flat with the boys and Dean came to the door in his shorts.

你们看，这也是在第二页的开始：,我和男孩们去了冷水公寓,安穿着短裤来到门口。

耶鲁公开课 - 1945年后的美国小说课程节选

Mystery spinners can get you wickets when no one else can on flat wickets.

BBC: West Indies slump to warm-up loss

Wheels work well on flat surfaces, but are much less efficient on uneven terrain.

ECONOMIST: REPORTS

It could land big rovers or small, on flat terrain or sloped, in all kinds of weather.

NEWYORKER: The Martian Chroniclers