This may be because we're used to healthcare workers wearing blue masks and now we associate these with people in caring or medical professions.
这可能是因为我们习惯看医护人员佩戴蓝色口罩,所以将蓝色口罩和这些人联系在一起。
长喜英语_大学英语六级考试_读美文记单词
Perhaps selection for the caring professions, especially medicine, could be made less by good grades in chemistry and more by such considerations as sensitivity and sympathy.