someone who is impressionable is easily impressed and influenced by other people , usually because they are young and lack experience in life （通常因年轻缺乏生活阅历而）易受影响的，敏感的
You worry about teenagers because they’ re at such an impressionable age. 你担心青少年们，因为他们正处于这样一个易受影响的年龄。