Who has seen the wind

Who has seen the wind?
Neither i nor u
But when the leaver(leaves??) hang trembling,
The wind is passing through
Who has seen the wind?
Neither u nor i
But when the trees bow down their heads,
The wind is passing by.
---Christina G.Rossetti--

.. Ai đã từng thấy gió?.. Chẳng phải bạn hay tôi. Nhưng khi lá run rẩy.. Gió phất phẩy đi qua..