part density 零件密度
medium density iron part 中密度铁零件
density part
密度的部分
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Every 12 months or so GM develops a new generation of fuel cells, and recent improvements in power density and part streamlining are impressive.
FORBES: On The Cover/Top Stories
Still, density is only part of the solution.
WSJ: To Build Creative Cities, the Sky Has Its Limit by Richard Florida
They also have limited options to zone land for high-density construction, due in part to grassroots opposition to existing residential neighborhoods.
FORBES: New Geographer
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