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Although plenty of LABS have made them, there are no standardized recipes for the nutrient and growth factor broths that help them grow into properly beating cells.

虽然许多实验室已成功制得心肌细胞，但是目前科学界尚无标准的养料和生长因素的培养基配方来帮助其培养成正常跳动的细胞。

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The bird must be able to maintain a stable position space, despite the fact that their wings are beating 75 times per second and that disruptive effects such as wind gusts could throw them off.

尽管蜂鸟的翅膀拍打速度达到了每秒75次，它们仍然可以在空中保持稳定，就算有狂风的干扰，蜂鸟仍然可以保持稳定的空间位置。

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"Beating the world's best team 2-0 and basically dominating them.

VOA: standard.2009.06.24

The traditional answer is that These guys actually did press up against the rows in front of them And that this provided a momentum That gave the front line an advantage in beating the enemy facing them.

传统的回答是,他们实际上是在推挤前面几排友军,为其提供一种动力,使前线在与对面的敌人交战时具有优势

耶鲁公开课 - 古希腊历史简介课程节选

She recalls playing against men when she was six and beating them.

ECONOMIST: Mona Karff

Costco, the largest warehouse retailers by sales, posted fourth quarter earnings, meeting Wall Street expectations on income and beating them on revenue.

FORBES: Consumers Prop Up Sales At Costco And BJ's While Weather Torments Staples

"Acer is good at finding opportunities in the market and beating on them until they're satisfied, " says IDC analyst Richard Shim.

FORBES: Entrepreneurs