If something seldom happens, it happens only occasionally.
近义词
rarely , hardly ever , infrequently
双语例句
例： They seldom speak.
他们很少说话。
例： I've seldom felt so happy.
我很少感到过这么快乐了。
例： The fines were seldom sufficient to force any permanent change.
这些罚款不足以推动永久性的变革。