不必是堅固或物理的

不必 buˊ biˋ

(Doesn't have to, Doesn't need to) Doesn't need to, Doesn't have to

不必是 buˊ biˋ shiˋ

(Doesn't have to, It doesn't) Doesn't have to be, It doesn't have to be

堅固 jianˉ guˋ

(Robust, Solid, Stable, Strong, Sturdy) Sturdy, Robust, Strong, Stable, Solid

堅固或物理 jianˉ guˋ huoˋ wuˋ liˇ

(Solid) Solid or physical

物理 wuˋ liˇ

(Physical, Physically, Physics) Physics, Physical, Physically

的 de˙ diˋ diˊ

Have, Has, At That, (Di4), Clear, Distinct, Target, Goal, (Di2), Accurate, Exact, Proper, (De5)