Sealants are painted on as a liquid and quickly harden to form a shield over the tooth.

保护胶像液体一样被涂上，迅速干燥，在牙面形成一层保护层。

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This paper describes the adaptation for dentistry of the medical three circle model as described by Harden to specify learning outcomes.

本文介绍了适应牙科医疗三个循环模型所描述的那样哈登指定的学习成果。

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After using, keep Chamois in the case supplied or just put Chamois at ventilated place. Chamois will harden to protect itself from germ and mildew to keep hygienic.

使用后，请将仿鹿皮巾洗净放进附送的塑料盒子中或者将仿鹿皮巾放置于通风处。仿鹿皮巾失去水分会变干硬，可以防止细菌侵入保持卫生。

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But somehow I couldn't seem to strike no places to harden me against him, but only the other kind."

VOA: special.2010.03.21

Workers later added cement to harden in the well to seal it permanently.

VOA: special.2010.08.07

Then high levels of heat harden it to produce many kinds of ceramics.

VOA: special.2009.09.09

The first domino fell before the season, when Oklahoma City sent James Harden to Houston instead of signing him to a big-money extension, and more are sure to follow.

NPR: Rudy Gay Heads To Toronto In Grizzlies' Makeover

With the clock running down at the end of the game, McHale told Harden to "go ahead and shoot it if you like, " but Harden opted to take the shot-clock violation.

NPR: Durant, Thunder Struggling To Close Out Rockets

"It is unlikely that we will ever know what caused the transmissions to cease, but it is time to harden up to the reality that the penguin has returned to the anonymity from which he emerged, " he told the news agency.

BBC: Concern mounts for 'missing' penguin Happy Feet