1544 ad造句

• The horizontal direction of the Earth's field was first measured in the fourth century BC but the vertical direction was not measured until 1544 AD and the intensity was first measured in 1791.
• Lu Shen ( 1477-1544 AD ) once reported in the early 16th century that printers of Changzhou used bronze and lead movable type printing, which could have been separate materials or an alloy mixture of the two.