In school, he was not one of the achievers.
上學時他不屬于拔尖的那類。
The two groups of children have quite different characteristics.
這兩組兒童具有截然不同的特點。
The project is still causing him a lot of problems.
這項工程現在仍然給他帶來許多的麻煩。
The need to communicate is a key characteristic of human society.
需要交流是人類社會最重要的一個特征。
The new test should aid in the early detection of the disease.
新的化驗應該有助于早早檢查出這種疾病。