Fold the letter into three parts be

Fold the letter into three parts before stuffing it into the envelope.

Results (Chinese Traditional) 1:

折成三信配件在 stuffing 之前它裝進信封。

Results (Chinese Traditional) 2:

折信分為三個部分塞入網絡之前納克入信封。

Results (Chinese Traditional) 3:

把信折成三部分在東西fiNG到信封。