The researchers found that taking folic acid halfway through pregnancy had no effect.

研究者发现在孕期中间服用叶酸没有效果。

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Genes are instruction manuals for cells to make proteins, but nonsense mutations in effect introduce a command halfway through that stops production.

基因是细胞合成蛋白的指导手册，但是无意突变半途增加了指令并通过该指令停止了合成。

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This is that a lens produces its biggest effect when it is halfway between source and observer.

ECONOMIST: Cosmology: I spy with my little gravitational lens | The

Understand that with political pressures and global concerns, decisions can be made halfway across the world that have a ripple effect in markets around the globe.

FORBES: Dealing With Short-Term Market Volatility

By deploying so many large, economical aircraft from a vast base, open around the clock and halfway between Europe and Asia, Emirates could in effect run a global hub, reducing European airports to a feeder role and impoverishing their associated flag carriers.

ECONOMIST: Aviation