Thrush is a degeneration of the frog with a secondary bacterial infection that begins in the central and collateral sulci.

鹅口疮是青蛙的退化，继发于中央和侧沟的继发细菌感染。

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Head trauma, central nervous system infections and tumors are associated with secondary epilepsy.

头部外伤、中枢神经系统感染和肿瘤与继发性癫痫有关。

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Traders say the European Central Bank (ECB) acted aggressively behind the scenes, calling some 20 dealers to buy Portuguese debt in the secondary market.

交易员称欧盟央行（ECB）在幕后积极行动，呼吁20家买家在二级市场购买葡萄牙国债。

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To glimpse one possible future, look at Parkside Community College, a popular secondary school in central Cambridge that takes most of the 12-year-olds who leave Newnham Croft.

ECONOMIST: Using scarce head teachers more wisely

But these numbers exclude any bonds that central banks buy in secondary markets abroad, so they surely underestimate the total.

ECONOMIST: Forever free | The

But in France, secondary education, a responsibility of the central state, is meant also to have the job of forming French citizens.

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