This is the codon, this is the anti-codon, there's only one anti-codon that matches this one and that anti-codon is always - occurs in a molecule that has leucine attached to the other side.

这是密码子,这是反密码子,只有一个反密码子与之对应,而反密码子的另一端,总是携带着一个亮氨酸

耶鲁公开课 - 生物医学工程探索课程节选