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- 杜邦T-400Dupont T-400
- 布莱克先生：这是爱丽丝。杜邦小姐。爱丽丝是一个新生。她是法国人。Mr Blake: This is Miss Alice Dupont. Alice is a new student. She is French.
- 这个医院有400个床位。This hospital has accommodation(s) for 400 patients.
- 这座山海拔1,400米。This mountain is 1,400 meters above sea level.
- 杜邦内Dubonnet
- 她400米跑了58.5秒。She clocked 58.5 seconds for the 400 metres.
- 杜邦试验Dupent's test
- 400Butterworth low_pass fiher
- 杜邦分析DuPont Analysis
- 400米400 meters
- 杜邦安全DuPont safety
- C-400C - 400
- 杜邦装置Dupont unit
- 400 克面粉400g flour
- 论杜邦分析体系的改进Discuss on Improvement of the Du Pont Analysis System
- S7-400S7-400
- 杜邦中国公司Du Pont China Holding Co., Ltd
- PEG-400PEG-400
- 奥杜邦学会Audubon Society
- 400米栏400-meter hurdle race
