A-A+ Although it is regarded long as a costly tool 2022-08-12 10:11:39 问答库 阅读 195 次 问题详情 Although it is regarded long as a costly tool by experts in his field，it is a popular means in modem research． 参考答案 该领域许多专家都认为这是一种昂贵的工具，但却是现代研究中最流行的方法。
