
FTabbr.傅里叶变换(=Fourier transform)abbr.立定罚球(=free throw)abbr.全职(=full time)abbr.英尺(=foot)The trees were planted at 20 ft intervals.这些树是每隔20英尺栽种一棵的。

FTabbr.傅里叶变换(=Fourier transform)abbr.立定罚球(=free throw)abbr.全职(=full time)abbr.英尺(=foot)The trees were planted at 20 ft intervals.这些树是每隔20英尺栽种一棵的。