The original copy of invitation has posted on March 28 .About two or three working days will arrive at yokohama.
英语翻译请帮忙把下边这句话翻译成英文（自己用英文翻出来的感觉很别扭）：邀请函原件已于3月28日寄出.大约两三个工作日到达
The original copy of invitation has posted on March 28 .About two or three working days will arrive at yokohama.