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caution and warning
 caution and warning
avia. 警告与警报; 警告和警报
| system
 system
gen.
IMF. 安排
met. ; 装置
tech. 制度; 体系; 系统

to phrases
caution and warning
avia. 警告与警报; 警告和警报
space 注意和警告
caution and warning
: 24 phrases in 3 subjects
Aviation20
Electronics1
Space3