例句與造句

1. this thesis makes a broad and profound research on the key technique in parametric and variational design . many methods is overviewed and many new techniques are also proposed
   本文首先回顧了cad技術(shù)發(fā)展的歷史，然后進(jìn)一步詳細(xì)分析了國(guó)內(nèi)外一些典型的約束求解方法，并對(duì)各種方法的優(yōu)缺點(diǎn)進(jìn)行了詳細(xì)的評(píng)述和綜述。
2. It's difficult to find variational design in a sentence. 用variational design造句挺難的