Schroeckingerite
板菱铀矿
🗣️ 情景例句
How long?
多久？
By all means.
当然，一定。
Such creatures have rarely been seen alive by man as they live at a depth of six hundred feet.
人们很少能看到活着的这类动物，因为它们生活在600英尺深的水下。