短语词组短語be alert to something 能夠覺察的Be alert to safety 工作中注意安全Be alert to sth 對Be Alert to Product Placement 警惕産品內置To Be Highly Alert 值得高度警惕to be alert for 警戒to be alert against 防範Enable me to be alert 使我是這般警覺 返回 be alert to