Nerves overstrung . must be abstemious to sing 为了唱歌，饮食得有节制。
2.
Natasha , who had at first borne the separation from her betrothed so easily and even cheerfully , grew now more impatient and overstrung every day 娜塔莎轻松地甚至愉快地熬过了她刚和未婚夫离别的孤寂的时日，现在一日日变得更加焦急和难以忍耐了。
