求教their biggest ever seizure翻譯

拜託各位先進幫我看看我的翻譯對不對,感謝

The coastguard seized 2,626 rare turtles on board another boat last month as they were being taken off the island, in what the authorities said was their biggest ever seizure of smuggled turtles.


8月,海巡署在另一艘船上緝獲2,626隻稀有海龜,當時這些海龜正被帶離台灣。海巡署表示,此為他們有史以來緝獲最大宗的走私海龜案。
更新: 還有以下這句,也要求教,

Because the number of wild turtles is in sharp decline in China, market prices have surged to about five times those of Taiwan, which is separated by a 200-kilometre (124-mile) strait from the Chinese mainland.


但中國大陸的野生海龜數量迅速減少,市價卻持續飆升。台灣與中國大陸相距不過200公里,但中國大陸的海龜價格卻升至約台灣海龜價格的5倍。
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