hit-and-miss
01
不一致的, 不可预测的
an inconsistent and unpredictable approach or method with no clear pattern of success or failure
例子
Her efforts at learning to play the piano are hit-and-miss, but she ’s improving.
她学习弹钢琴的努力时好时坏，但她正在进步。
不一致的, 不可预测的
