They are rare but they have been noticed in Racetrack Playa and a few other arid places around the world subject to occasional floods.
它们并不常见,除了在赛马场盐湖有,在其他一些时有洪水的干燥地区也有。
In winter, Racetrack Playa fills with water and the lakebed「s stones become encased in ice.
一到冬季,赛马场盐湖涨满了水,而湖床里的石头则被冰封起来。
An additional reason for studying the rocks of Racetrack Playa is that its qualities resemble those at a drying-up lake on Saturn」s moon Titan.
之所以研究赛马场盐湖的石头,因为它的情况和土星的卫星Titan(泰坦)上干枯的湖情况相似。
Jackson, who works at NASA's Goddard Space Flight Center, also likes the idea that their research at Racetrack Playa has a dual purpose.
Jackson在NASA的戈达德航天飞行中心工作,他也认为在赛马场盐湖的研究具有双重意义。