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1.There is international agreement on the protection of 18 threatened species of sharks and rays.
threatened species 濒危物种
The spotted owl is a threatened species, not yet an endangered one.
花斑猫头鹰是一个受威胁的物种，还不是一个濒临灭绝的物种。
2.CITES is an international treaty established in 1973 to protect endangered animals and plants.
treaty 条约
Under the terms of the treaty , La Rochelle was ceded to the English.
根据这个条约的条款，拉罗谢尔割让给了英国人。
