The surgeon would first apply a sponge over the cleaned wound and then cover it with a plastic seal.

医生首先将一块海绵放在清洗过的伤口上，然后用一个塑料密封垫将伤口封起来。

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When the first Europeans reached Tasmania, they found natives whose only shields against the winter chill were seal-fat smeared on their skin and wallaby pelts over their shoulders.

当第一批欧洲人到达塔斯马尼亚岛的时候，他们发现，当地人仅仅依靠往皮肤上涂抹海豹油脂和肩披沙袋鼠毛皮，来抵御冬天的严寒。

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Never let the water level fall below the base of the tree or the cut end may seal over, preventing further water intake.

不要让水位降到树基以下，或者树干截面以下，否则截面干涸以后，松树就无法充足的吸收水分了。

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Canada rejected the European Union's application for observer status due to a long-running dispute over seal hunting and a ban by Brussels's of seal products, such as hide.

WSJ: Arctic Council Grants Observer Status to Six Countries

Withers then crashed over to seal Crusaders' first double over a Super League side, meaning Whitehead's late score for the Bulls was little more than consolation.

BBC: Crusaders 44-20 Bradford

Clinton Toopi, Jamie Peacock, Brent Webb and Rob Burrow all went over to seal the Rhinos win.

BBC: Leeds 38-19 St Helens