例句與造句

1. some useful species for biological control were introduced in detail
   本文還對一些在生物防治上有利用價值的種類作了重點介紹。
2. for the first time a remote mountainside location will be the centre of top-level planning on issues such as the reintroduction of plants to their natural habitats and the development of sustainable production systems for medicinal and other useful species
   該計劃將涉及包括將植物從新引進(jìn)到其自然生長地，以及開發(fā)藥用物種和其它物種的可持續(xù)生產(chǎn)系統(tǒng)等方面的問題。
3. It's difficult to find useful species in a sentence. 用useful species造句挺難的