While exposing the left half, the subject gives his or her performance. At the same time, the right half is carefully covered so that it is not exposed to light.是什么意思_While exposing the left half, the subject gives his or her performance. At the same time, the right half is carefully covered so that it is not exposed to light.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句