Friendship is unnecessary. It has no survival value. Rather, it is one of the things which gives value to survival.

语音讲解
单词发音
friendship n.友谊；友爱；友善
unnecessary adj.不必要的；多余的，无用的
survival n.幸存，残存；幸存者，残存物
value n.值；价值；价格；重要性
rather adv.宁可，宁愿；相当
连词发音
friendship is unnecessary
轻读重读
重读：unnecessary/survival value/ rather/value/survival
弱读：It/of the/which/to

词汇讲解
1.survival adj.
释义：the state of continuing to live or exist 生存的
survive verb. 生存
survival kit 求生背包
survival of the fittest 适者生存
The "survival of the fittest" was the key to the constant change in species.
“适者生存”是物种不断变化的关键。
survival value 生存价值
XX value=XX价值
This story has very little news value.
这件事没什么新闻价值。
2.rather adverb.
①释义：fairly or to some degree=quite
例句：I was rather surprised to see him with his ex-wife.
②释义：本句中（but） rather 表“然而” “相反地”
例句：It's not the uncertainty of life, but rather, it's the ever-changing.
这不是生活的不确定性，而是生活在不断的变化。
知识点拓展精讲
宁愿 宁可 would rather do/be的用法：
√ I would rather play than study.
✗Don't say: I would rather to play than study.
√ I would rather be rich than poor.
✗Don't say: I would rather to be rich than poor.
√ I would rather you came in spring.
歌曲 Rather Be中，rather的应用：
When I am with you, there's no place I rather be
只要有你相伴 所到之处都是天堂

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