去年太阳能的价格却开始回落。

Last year, though, prices began to drop.

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接着，海平面重新保持稳定，或者有些许回落，直至19世纪后期开始，海平面又接着上升。

Sea level then held steady, or slightly fell, until the late 19th century, when the current sea level spike began.

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在现货交易市场，以即买即付形式交易的铁矿石的价格翻了一翻（虽然现在价格开始回落）。

Iron ore prices on the spot market – for immediate delivery – more than doubled over the period, although they have since fallen back.

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