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研究开发
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DEFINITIVE EXAMPLES 权威例句〔cautious〕Companies seem cautious about investing(=are unwilling to invest) money in research and development.公司在研究开发方面的投资似乎比较谨慎。麦克米伦高阶
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trinitrocresol
trinitrodichlorobenzene
trinitrofluorenone
trinitroglycerin
trinitrol
trinitromethane
trinitron
Trinitron
trinitron
trinitron projector
trinitron tube
trinitronaphthalene
trinitrophenol
trinitrophenyl
trinitrophenyl-hydrazine
trinitroresorcin
trinitroresorein
trinitroso-trimethylene triamine
trinitrotoluene
trinitrotoluene
trinitrotoluol
trinitrotriphenyl-carbinol
trinitrotriphenyl-methane
trinitroxylene
trinity
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更新时间:2026/6/7 3:06:14