@MelpomeneMel @LazarusLong13 When there was smoking on planes, non-smoking flight attendants would have blood markers for smoking similar to smokers.
@MelpomeneMel@LazarusLong13当飞机上吸烟时，不吸烟的空乘人员会有与吸烟者相似的吸烟血液标记。
@MelpomeneMel @LazarusLong13 When there was smoking on planes, non-smoking flight attendants would have blood markers for smoking similar to smokers.
@MelpomeneMel@LazarusLong13当飞机上吸烟时，不吸烟的空乘人员会有与吸烟者相似的吸烟血液标记。