常見(jiàn)例句用作形容詞 (adj.)He thrusts aside all precautionary advice.他把一切警告都置之一邊。We have to take precautionary measures.我們不得不采取預(yù)防措施。This was purely precautionary with all three players.這完全是對(duì)三名球員的預(yù)防措施。 返回 precautional