At least one expert says such sites pose serious ethical questions.

至少有一位专家说这种网站会造成严重的道德问题。

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One expert says they should each make the most of future opportunities.

一个专家称他们应该充分利用未来的机会。

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One expert says that "Excellence pulls in one direction; rewards pull in another."

一位专家说：“优秀在一个方向用力，而奖励在一个方向用力。”

youdao

The important thing,says one expert, is to find the right tree for the right place for the right use.

VOA: special.2009.09.01

One language expert says that deep six is the bottom of the ocean.

VOA: special.2009.05.24

One expert,John Ayto, says the word dumps probably comes from the Scandinavian countries.

VOA: special.2009.10.25

It is "politically dangerous", as one expert says, to target the reproductive ability of men in India.

BBC: Is India's population policy sexist?

The company declined to disclose the size or terms of the agreement, but one expert says Mr. Vick likely came at a discount.

WSJ: Michael Vick's Endorsement of Unequal Technologies Padding

One industry expert says expect Leno to do nothing (except swipe at NBC executives in his monologues) and gracefully step out when his contract expires.

FORBES: Jimmy Fallon Could Double His Payday With 'Tonight Show' Move