K eep trying no matter how hard it seems, it will get easier.
不论多么艰难，努力尝试，会让它变得容易。
The -s option ensures that it generates a summary of the whole directory, rather than the contents, and the -k option ensures that you get the directory size in kilobytes.
s选项确保生成整个目录的摘要信息，而不是所有内容的信息，并且- k选项确保以KB为单位显示目录大小。
K: Leave it to you to get off on ancient buildings.
凯西：只有你才会喜欢那些古老的建筑。
K: Leave it to you to get off on ancient buildings.
凯西：只有你才会喜欢那些古老的建筑。
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