虾壳变色但无异味？如何判断虾是否新鲜？

Some shrimp only change color in their shells and do not have any abnormal odor. 'This may be due to factors such as improper storage or the use of preservatives. To determine if shrimp is fresh, it's best to look for other signs, such as a firm texture, clear eyes, and a mild, fresh scent.'