However, you can change any of the colors using color codes denoted in the hex range, prefixed with the letter x. The format for the hex codes are.
但是，可以使用颜色编码指定任何颜色，颜色编码以字母x开头，用十六进制表示。
To that end the Hubble Space Telescope often proves handy for discovering celestial objects shaped like everything from a sea horse, the letter X, tadpoles and flying saucers.
正因为这样，哈勃太空望远镜常常能轻而易举地找到一些神迹，从海马，到字母x，从蝌蚪到飞碟，各种形状的神迹都能被它发现。
The letter "x" often represents an unknown number in some Math exercises.
在一些数学练习中，字母“x”通常代表一个未知数。
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