Just dart into the market,grab a box of the old reliable and scoot through the express line. 我飞快地冲进商店，抓起一盒可信的老牌洗衣粉，然后疾步走向少件商品收款处。
To scoot around the solar system and return within a few years, you need a spacecraft that will cruise at 160 km a second. 漫游太阳系，并在数年内返航，你需要一艘巡航速度为每秒160公里的航天器。
