1911年的今天，美国成为布宜诺斯艾利斯版权条约签字国。
1911 - the United States becomes a signatory to the Buenos Aires copyright treaty.
本条约签字原件应为一份，其英文、阿拉伯文、中文、法文、俄文和西班牙文各文本具有同等效力。
This Treaty shall be signed in a single original in the English, Arabic, Chinese, French, Russian and Spanish languages, all texts being equally authentic.
1986年，英法海峡隧道条约正式签字。
In 1986, The anglo-french channel tunnel treaty signed officially.
应用推荐