例句與造句

1. A two-way distance record for communication was set by the Mercury laser altimeter instrument aboard the " MESSENGER " spacecraft . This diode-pumped infrared neodymium laser, designed as a laser altimeter for a Mercury orbit mission, was able to communicate across a distance of 24 million km ( 15 million miles ), as the craft neared Earth on a fly-by in May, 2005.
2. It's difficult to find mercury laser altimeter in a sentence. 用mercury laser altimeter造句挺難的