• Jackson says, which gives plant breeders around the world a head start in improving food production.

    VOA: standard.2010.02.01

  • The other two you know are stuff you can add, and you know where you're adding those things, because the particle has a head start.

    另外两项是可加可不加的,而且你也知道这两项是怎么来的,因为质点运动是有起点的

    耶鲁公开课 - 基础物理课程节选

  • OK. So we should be able to figure this out for any orbital that we're discussing, and when we can figure out especially radial nodes, we have a good head start on going ahead and thinking about drawing radial probability distributions.

    我们可以将这种方法,用于任何轨道,当我们可以算出有多少个径向节点的时候,我们就为画出径向概率分布,开了个好头。

    麻省理工公开课 - 化学原理课程节选

  • As it grows,a cauliflower plant will start to form a head.

    VOA: special.2010.03.09

  • Then he would fall down on the floor again like a ball of dirt and start rubbing the side of his head with his back foot as if he had no idea he had been doing any more than any frog might do.

    VOA: special.2009.08.29

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