On the supply side (chart 2, bottom panel), the main source of new gold-what is dug out of the world's goldmines-has been flat or declining.

在供给方面(图2，下半部分)，从世界各地的金矿开采出来黄金是新的黄金的主要来源，这部分数量已经趋平或者说在下降。

youdao

The test consists of placing the bottom of a foot in water, then stepping on a paper bag or some other object that will show how high or flat a person's arch is.

测试要先把脚底浸湿，然后踩在纸袋或其它可以显示你足弓高度的物体上。

youdao

The flat wings shown on the bottom symbolize steadiness decency and faithfulness. the entire motif suggests surmounting soaring peacefulness and the upbeat and blessed future.

底座平切的翅膀，则是稳定正派诚实的表征。整个造型象征超越、翱翔、和平，以及带向健康快乐的未来。

youdao

It sits flat on the ground with the bottom open to the earth.

VOA: special.2010.07.13

Deep Flight Aviator's wings, viewed in cross section, look exactly like an airplane's, upside-down: They're curved on the bottom, flat on top.

FORBES: Cruising Altitude: Minus 400 Feet

The anodized aluminum chassis curves around to cradle the LCD on the left and right, but it's flat on the top and bottom, with edges exhibiting the subtle chamfering that appears to be all the rage these days.

ENGADGET: iPod nano review (2012)

Cristal is one of the oddest looking bottles on the market with its clear bottle, flat bottom and cellophane wrapping.

FORBES: From Tsars to Rap Stars,The Story Behind Cristal Champagne