erraticadj.古怪的；飘忽不定的；不稳定的erratic orebody漂积矿体erratic element不稳定因素erratic formula性质无定的公式erratic boulder漂石,漂块,漂砾erratic current涡流erratic process漂游过程erratic delivery不稳定的交货erratic children乖僻儿童erratic behavior不规律性erratic ignition不规律点火