发黑

Flea is the common name for insects of the order Siphonaptera, which are wingless insects whose mouthparts are adapted for piercing skin and sucking blood.

跳蚤是一种无翅昆虫，它的口器特别适宜刺穿皮肤吸食血液。1347年印发黑死病的耶尔森氏鼠疫杆菌就是跳蚤传播的。

The house for air-drying raisin The grape can not be dried under the sunshine, or it

4《风干葡萄干的房子》听说葡萄干不能直接晒太阳，否则会发黑！

The house for air-drying raisin The grape can not be dried under the sunshine, or it will turn black.

4《风干葡萄干的房子》听说葡萄干不能直接晒太阳，否则会发黑！

High quality float glass can be used to make high grade mirrors that are highly clear. Through a second processing (beveling, carving, drilling, etc.), the coating will last long and will not turn black or go bad with use. The product has a very promising market.

采用优质浮法玻璃原片加工的高档银镜成像清晰，二次加工镜面膜不损坏脱落，长期使用不会发黑或产生其他变质现象，具有广阔的市场发展前景。

If it becomes whiter, it contains silver, if it becomes rough and hard, it contains copper and tin, if it softens and blackens it contains lead.

如果它变白了，它含有银，如果它变得粗糙和发硬，它含有铜和锡，如果它变软和发黑，它含有铅。

Oh - maybe you can also tell me exactly what is the chemical that the modellers use to dip the brass parts into which blackens them?

哦，也许你也可以告诉我模型制作者到底使用什么化学品，把黄铜部件浸入其中使其发黑呢？

Is it true the arsenic blackens silver?

砒霜真会让银发黑吗？

The vent of air-conditioner is a wooden product,so the condensation there in long term easily blackens the wood and makes it moldy,that frequently needs maintenance and the cost will be higher.1200 kwh will be a waste the balcony door of 400 rooms in a hotel open averagely for half an hour,and the waste per month is 36,000 kWh.

因空调风口是木制品，长期有冷凝水容易使木头发黑及发霉。造成经常维修和成本上升。一家酒店400间房平均每天只打开阳台门半个小时即浪费1200度电，一个月将浪费36000度电。

Such a steep descent in an airplane would have blacked out a fledging.

飞机作这样的急速下降本来是会使缺乏飞行经验的人眼前发黑的。

The films are developed and the degree of fogging observed is a measure of the gamma-ray exposure .

经显影之后，可以根据观察到的模糊发黑程度来确定r射线的照射程度。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。