"Fish have a refuge in the streams and can expand into the lagoons when the lake is low and the lagoons are separate," Harper said.

“鱼在溪流中有一个避难所，当湖处在低处且泻湖分开时，它们可以扩张进入泻湖。”哈珀说。

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“Because Merck was so aggressive, it went too fast, ” Dr. Harper said.

“因为默克公司是如此咄咄逼人，它进行得太快了，”博士哈珀说。

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"Canada is proof that a system of strong national regulation can work", Mr Harper said.

“加拿大证明，强有力的国家监管体系能够奏效，”哈珀表示。

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In the Oval Office, Prime Minister Harper said he does not worry that the Taliban could form an alternative government in Afghanistan, but that he is concerned about the Afghan government's ability to maintain security.

VOA: standard.2009.09.16

Canada's Prime Minister Stephen Harper, who in opening the summit said nations are walking an economic "tightrope."

VOA: standard.2010.06.27

Ms. Harper said the department periodically reached out to relatives to check on Ms. Knight's status.

WSJ: Lapse in Missing-Persons List Questioned by Cleveland Officials

Conservation director Martin Harper said it was a "stark reminder of how fragile this species is".

BBC: Stone curlews died underweight because of 'cold spring'

Dr Harper said 17 people had died from swine flu since the beginning of the year.

BBC: Health Committee