这种情况可能发生在任何一种皮托管探测器上，但是到了2009年夏天，泰勒斯 AA 型皮托管结冰的问题已经人尽皆知。
This could happen to any kind of pitot probe, but by the summer of 2009, the problem of icing on the Thales AA was known to be especially common.
凤凰号探测器降落在结冰面的土地上，那里的土质富有过氯酸盐。
The ground on which Phoenix landed is icy, and is also rich in salts called perchlorates.
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