They will cake on the walls of the heat exchanger, from which they could be removed easily during periodic shutdowns . 它们将粘着在热交换器的壁上，因此在定期停机时很容易把它们刮取下来。
By 1950 he was making regular weekend visits to massachusetts, speaking in places remote from his own district . 到了一九五年，他到马萨诸塞州进行定期的周末访问，在离他自己选区很远的地方演讲。
The mid-to-late-1960s was a time when "women's liberation" became a phrase on many lips and a fixture in the news . 六十年代中期到末期，“妇女解放”，成了许多人的口头禅，在新闻报导中更是定期出现。
The bureau of labour statistics is empowered with the important task of regularly collecting and reporting statistics on the labor force . 劳动统计局受权执行定期搜集和报告劳动力统计数字的重要任务。
As ships have to go for periodic refits, it would have been almost beyond our power to maintain a reasonable margin of superiority . 由于船舶需要定期检修，因此我们的力量很难维持海军优势所必需的适当余力。
The initial determination should be followed by periodic assays during the working season, so that changes can be detected before exposure reaches a serious level . 在使用期间，应于初始测定之后进行定期测定。因此在暴露达到严重程度之前，可以检测出它的变化。
If we discipline ourselves to adopt periodically a "nonego" state, we can perceptively drink in the full meaning of a situation without imposing ourselves upon it . 如果我们训练自己定期地置身于“无我”状态，我们就能敏锐地领会形势的全部含义，而不会受骗上当。
The administrative fee is subject to review regularly 有关的行政费会定期检讨。
Elderly swimmer should have a periodic body check 高龄游泳人士应定期检查身体。
To track changes on a volume , see change journals 跟踪改变一个值,看他定期改变
