It turns out there's a new function strlen S-T-R-L-E-N that you probably have not used yet called strlen, S-T-R-L-E-N, programmers early on and still like to be succinct but communicates sufficiently what they mean.

结果这里有个新的函数,你可能没有使用过，叫做，早期的和现在的程序员喜欢简洁地,但是能充分的传达他们的意思。

哈佛公开课 - 计算机科学课程节选

Y You don't want to rename them L and R or X and Y right because you want to call them left and right.

你不想把它们重命名为L和R，或者X和,因为你想叫它们为left和。

哈佛公开课 - 计算机科学课程节选