The volunteers placed the plants about five centimeters into the soil to prevent rising and falling water levels from pulling them out.

VOA: special.2009.10.06

So because we're feeling a stronger attractive force from the nucleus, we're actually pulling that electron in closer, which means that the probability squared of where the electron is going to be is actually a smaller radius.

因为我们能感到来自原子核,的更强的吸引力，我们实际上会将电子拉的更近，那意味着电子运动的,概率半径是,事实上是一个更小的半径。

麻省理工公开课 - 化学原理课程节选

And when we do a simulation, we're pulling the samples from some distribution.

当我们写一个仿真程序的时候，我们就是从一些分布中进行了采样。

麻省理工公开课 - 计算机科学及编程导论课程节选

After heavy rains or too much watering, he advises pulling away mulch temporarily from around the roots.

VOA: special.2010.06.15

Other controls include turning over the soil, pulling the weeds by hand or covering them with mulch made from wood, garden waste or other material.

VOA: special.2009.05.26

Workers at the market reportedly doused the flames, pulling drivers from their burning vehicles.

VOA: standard.2009.06.01

"It's because we have the prevailing wind at the moment coming from the north, pulling the material down towards Western Europe that we're seeing the impact on the travel of so many people."

VOA: standard.2010.04.16