Vietnamese wordsố máy lẻIn your course · Chapter 37Part of speechnounLevelB1FrequencyNo. 1,898 in the course corpusMeaningstelephone extensionSource: Tonada courseRelated wordsbiếtto knowbàilesson; exercisebàn phímkeyboardbútpenbảngboard; blackboardchiềuafternoonchậmslowchỗplace; spot