单词	school flag
释义	school flag 校旗
随便看	preventing risks preventing risks in inventory audit preventing rust preventing SAG of doors preventing salt preventing SCOURING by rivers or sea preventing seasickness preventing seizure preventing silting preventing SKIDDING of ladders preventing slipperiness preventing slipping of windings preventing SLIPPING on rails preventing SNORING preventing SPARK preventing SPARKSin mines preventing spontaneous combustion of coal preventing sprouting preventing static charge preventing step preventing surge control preventing surge device preventing system preventing tampering with safes preventing TAMPER with safes