9. Международные наблюдатели не были удивлены, что договор, запрещающий использование мин, был одобрен быстрее, чем любой другой многосторонний договор в истории человечества.
9. the international observers were not surprised that a treaty banning the use of mines was approved faster than any other multilateral treaty in history.
9. International observers were not surprised that a treaty banning the use of mines, was approved faster than any other multilateral treaty in the history of mankind.
9. International observers were not surprised by that treaty, which prohibits the use of mines, was endorsed by faster than any other multilateral treaty in the history of mankind.