You must have been on the Central Line.
你一定是乘的中央线地铁。
The patient's Central Line must be kept clean.
患者的中心静脉导管必须保持清洁。
Seven or more successive points within the same side of control Central Line.
连续七点或更多点在控制中心线的同一侧。
Catch the Metropolitan to Liverpool Street and then change to the Central Line.
乘都会线，到利物浦街，再转中央线。
Catch the Metropolitan to Liverpool Street and then change to the Central Line.
乘都会线，到利物浦街，再转中央线。
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