It's providing a means of deciding where the gum has decayed.

它作为一种手段帮助诊断牙龈炎。

The newspapers particularly might have deteriorated, decayed or decomposed over time.

尤其是里面的报纸可能已经被腐蚀，或者随着时间自身腐烂降解了。

But like a garden, peace had to be nurtured and maintained, otherwise it decayed.

但就一样，平静需要呵护和维护，否则它就会腐朽。

The three voices passed on, and decayed and died out upon her ear.

三个人的说话声越去越远，变得低微，最后就再也听不见了。

The decayed officer, by degrees, came up alongside his fellow-wayfarer, and wished him good evening.

衰老的海军军官走上前去，来到赶车的身旁，向他道晚上好。

For example, peatlands are turf areas consisting of partially decayed vegetation and other organic matter.

比如泥炭地是由于部分腐烂植被及其他有机物组成的植草区域。

It lies high upon the hill, between the large oak-trees, one of which is half decayed.

它高高地立在一座山丘上，在一丛栎树的中间——其中有一株已经半死了。

Mary-Ann smiled. Notwithstanding her black decayed teeth there was in her smile something sweet and touching.

玛丽—安笑了。 尽管她有一口黑蛀牙，但是她的笑容还是显得很甜美动人。

" O no, " she said, intractably moving to the other side of the decayed fire.

“咳，不要这样，”游苔莎说，不依不从地朝快要熄灭的篝火那一边走去。

Under the influence of the gravitational force of a black hole, the binary system of stars decayed.

在黑的影响下，双星系统衰变。

It is because a good deal of matter from decayed plants is mixed with the soil.

这是因为很多腐烂的植物与土壤混合在了一起。

An old, old ivy vine, gnarled and decayed at the roots, climbed half way up the brick wall.

一棵老极了的长春藤，枯萎的根纠结在一块，枝干攀在砖墙的半腰上。

A little bit of beryllium was made as well, but it was radioactive, and rapidly decayed into lithium.

也产生了少量铍，但它具有放射性，并迅速衰变为锂。

This process of fossilization starts when water carries minerals like calcium and iron, into cavities of the decayed bone.

当水携带钙和铁这样的矿物质进入腐烂的骨骼时，这个石化过程就开始了。

And after your gums start to go away, you'd lose your teeth as they decayed and fell out of your mouth.

牙龈消失后，你的牙齿也会因蛀牙而脱落。

Lab analysis revealed the miniscule bits to be carbon-based blobs of soil material—like decayed bits of plants and soil-dwellers.

而实验分析表明这些微粒原本是以碳为基础的土壤物质，比如在腐烂的植物和其他土壤寄居物中就能发现。

In Orthodox Europe, mass religion seems to have decayed less.

【decay】在正教会流行的欧洲地区，集体宗教信仰的影响似乎衰退得较少。

" Oh — decayed gentleman, " Bernald murmured, disappointed.

“哦——堕落的绅士，”伯纳德失望地低声说。

In the head there is a slit or mouth, by which the worm is able to feed on decayed plants.

它的头上有一个狭缝（嘴巴）, 蚯蚓就是通过这个器官进食一些腐烂的植物。

More cells survived, so the brain decayed less.

更多的细胞存活下来，所以大脑腐烂得更少。