不可缺少的英文
建议用 an indispensable part of (my/your/his/one's) life.例句：Mobile phones have become an indispensable part of our lives. 此外，可以考虑：a vital part of lifea necessary part of life以及网友提示的 an essential part of life。
建议用 an indispensable part of (my/your/his/one's) life.例句：Mobile phones have become an indispensable part of our lives. 此外，可以考虑：a vital part of lifea necessary part of life以及网友提示的 an essential part of life。