Arrows would continue to fly forward forever in a straight line were it not for gravity, which brings them down to earth.

要不是重力使箭掉落地上，它将会一直沿直线往前飞行。

When he came down to earth after his win he admitted: "It was an amazing feeling."

当在胜利之后回来面对现实时他承认：“当时感觉太棒了。”

Scientists want to bring a chunk of the red planet down to Earth on what's called a sample-return mission.

科学家们希望将这颗红色星球的一大块带回地球，进行所谓的取样返回任务。

You're methodical, practical and down to earth.

有方法，重实际，脚踏实地。

The man who helped bring solar power down to earth was Elliot Berman.

帮助将太阳能动力从太空拉回地球的人是艾略特•伯曼（Elliot Berman）。