昔はもっとシンプルだったよね

Meaning
things were so much simpler back in the day

Vocab used in this sentence

old, the past, once upon a time, long ago, former, formerly, ancient times
a, the, is, am, are, will
もっと
more, more, longer, further, farther
シンプル
simple, simplicity, plain, simply, basic, simplify
is, be, are, am, it is, seems
the, was, ta, da, other
the, yo, ll
ne, right, isn't it, don't you think, huh, aren't you

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