例句：
The need to communicate is a key characteristic of human society.
需要交流是人類社會(huì)最重要的一個(gè)特征。
Personal characteristics, such as age and sex are taken into account.
個(gè)人的特征，如年齡和性別等，都要考慮進(jìn)去。
The two groups of children have quite different characteristics.
這兩組兒童具有截然不同的特點(diǎn)。
Physical characteristics are determined by genetic inheritance.
身體的特征取決于基因遺傳。