In American society, however, the class structure was less rigid; some people changed occupations easily and believed it was their duty to improve their social and economic position.
然而,在美国社会,阶级结构没有那么严格;有些人很轻易地就改变了职业,并认为提高他们的社会和经济地位是他们自己的责任。
SCAT-I avionics uses the received signal to improve position accuracy and signal integrity along a defined flight path.
SCAT-1航空电子设备利用接收到的信号,来改善沿着确定的飞行路径的位置精确度和信号集成度。
Sanyuan's products were found to be safe, and the company has said it would use its unscathed reputation to improve its position in the market.
三元公司的产品被认为是安全的,该公司已表示,将弥补其损害的声誉,以提高其在市场中的地位。
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