adj.松动的；紧张不安的
动词unstring的过去式及过去分词形式.
But his spirit was unstrung by his misfortunes. 但是他的精神并不因这种种不幸而松懈。
The incident left him unstrung and incapable of rational effort. 这一事变让他焦虑不安，不能采取理智的措施。
