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It used to apply only to reflecting telescopes in which the primary mirror was a paraboloid, and thus capable of forming an image all by itself.
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它过去只用在抛物面反射望远镜上,这种镜子只用主反射镜就能成像。 |
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It used to be believed that sugar could decay the teeth.
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过去人们认为糖会腐蚀牙齿。 |
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It used to be believed that the earth was flat.
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以前的人相信地球是平的。 |
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It used to be considered that the Loushanguan Formation was composed of thick-bedded dolomite, which is very difficult for division.
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传统上认为湘黔交界处的中寒武统—下奥陶统娄山关组为均一性极强的厚层白云岩,可分性极差。 |
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It used to be customary in England for a man to give up his seat to a lady in a crownded tramcar.
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在拥挤的电车上,男子让坐给女士,往昔在英国是习以为常的。 |
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It used to be my favourite restaurant but the standard of cooking has fallen off recently.
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那是我以前最喜欢的饭馆,但近来烹饪水平已大不如前了。 |
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It used to be one of China's waterway hubs.
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大牛:它可是中国水路的交通要道。 |
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It used to be that every household had a well; now the village hires a truck to fetch water from a mile away.
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以前村民每家每户都有一口水井,如今村里只能雇一辆卡车,从几里外往回拉水。 |
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It used to be the Royal Naval College.
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它过去曾是皇家海军学院。 |
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It used to jump to a big space for break.
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如果有很大的空间,牠习惯跳上去休息。 |
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It used to test mobile radio frequency(RF) field shown in both index bar and value to judge normal mobile transmission and RF output.
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具检测手机射频场强功能,以射频电压指示灯及射频电压值表示,从而判断正常的射频输出及手机的发射情况。 |