不常 的中文句子和英文句子

矿井爆炸虽然不常发生, 但却是煤矿工人职业中的危险.

Explosions, though infrequent, are an occupational hazard for coal-miners.


用于永久或长期存储不常检索的数据的地点（介质）。例如，计算机的档案文件可放在磁带上。

Place for permanent or long-term storage of data, from which retrieval is infrequent. A computer archive, for instance, may be on magnetic tape.