proof of principle

proof-of-principle是什么意思 proof of delivery是什么意思 proof-of-concept是什么意思 proof of qualifications是什么意思 the principle of Mudarabah Absence of proof is not proof of absence. proof of life 什么意思 the principle of the telescope proof The best proof of love is proof of the single packing翻译 the best proof of love is trust