WHEN Charles Darwin opened his first notebook on the subject of how organisms change over time, the field was not even referred to as “evolution”.

当查理斯达尔文打开他的第一本笔记本来研究生物体如何变化的时候，他研究的这个领域还没有被称作“进化论”。

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No matter how I tried to change the subject, he carried on.

无论我怎么努力改变话题，他还是滔滔不绝地说个不停。

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Just how much of the subject matter does the photographer have to change before fact becomes fiction, or a photograph becomes metaphor?

只是在真实变为虚构，或照片变为隐喻之前，摄影师得改变多少内容？

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Obama's basic belief that Israel's strength and size are to blame for all the violence and radicalism in the Arab world is not subject to change regardless of how clearly and continuously events on the ground prove it wrong.

CENTERFORSECURITYPOLICY: Netanyahu must play for time

How can you, within 24 hours, try to change the subject to tax returns when you keep saying you want to talk about jobs, you want to talk about Medicare?

WHITEHOUSE: The White House

The World Gold Council, which is the market development organization for the gold industry, said it is in discussions with member companies on the subject, did not elaborate on the reason for the move to change how costs are calculated.

FORBES: FOCUS: Some Fund Managers Like New 'All-In' Gold Miner Cost Metrics; Others Say More Is Needed