下面介绍的一些小发明已经成为我们生活中必不可少的一部分，甚至没有人称其为“发明”。
We bring you some of the inventions which became an integral part of our lives and didn't even claimed the title of an invention.
智能手机已经成为我们日常生活中必不可少的一部分。
Smart phones have become an essential part of our daily lives.
因此，朋友已成为生活中必不可少的一部分，这也是为什么若是朋友间充斥着猜疑、心痛和眼泪时，会伤害我们如此之深。
Hence, friends have become a fabric of our lives - which also explains why it hurts us so when a friendship is fraught with confusion, heartache and tears.
因此，朋友已成为生活中必不可少的一部分，这也是为什么若是朋友间充斥着猜疑、心痛和眼泪时，会伤害我们如此之深。
Hence, friends have become a fabric of our lives - which also explains why it hurts us so when a friendship is fraught with confusion, heartache and tears.
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