[转载]疑难解答：the parts that thou shouldst bear?

bear =  (1)distinguish (2)play

SONNET 008 (by William Shakespeare)

Music to hear, why hear'st thou music sadly? 
Sweets with sweets war not, joy delights in joy.
Why lov'st thou that which thou receiv'st not gladly,
Or else receiv'st with pleasure thine annoy? 
If the true concord of well-tuned sounds, 
By unions married, do offend thine ear, 
They do but sweetly chide thee, who confounds
In singleness the parts that thou shouldst bear. 
Mark how one string, sweet husband to another, 
Strikes each in each by mutual ordering, 
Resembling sire and child and happy mother 
Who all in one, one pleasing note do sing: 
    Whose speechless song, being many, seeming one,
    Sings this to thee: 'Thou single wilt prove none.'


NOTES

In singleness the parts that thou shouldst bear: by remaining a childless bachelor, the friend is failing to play his part in the harmony of life, which is family.

SONNET 8 权威汉译：

http://blog.sina.com.cn/s/blog_a795440b0101i2lv.html

（英语翻译交流网）