Dark Side of a Natural Gas Boom
By JAD MOUAWAD and CLIFFORD KRAUSS
Some environmentalists are concerned that a technology called hydraulic fracturing used to produce natural gas could be leading to pollution.
BUY OR SELL-Japan steel firms: metal fatigue or time to shine?
Reuters - USA
By Yuko Inoue TOKYO, May 21 (Reuters) - Renewed interest in Japanese steelmakers' strong edge in super high-end sheet steel has boosted their shares by ...
SAN FRANCISCO — The onslaught of cellphone calls and e-mail and instant messages is fracturing attention spans and hurting productivity. It is a common complaint. But now the very companies that helped create the flood are trying to mop it up.
━━ n. 猛攻撃 ((on)).mop sth up (CLEAN) phrasal verb [M]
to use a cloth or a mop to remove liquid from the surface of something:
There's milk on the floor over there - could you get a cloth and mop it up?
metal fatigue 金屬疲勞 (喻)
Weakened condition of metal parts of machines, vehicles, or structures caused by repeated stresses or loadings, ultimately resulting in fracture under a stress much weaker than that necessary to cause fracture in a single application. Fatigue-resistant metals have been developed and their performance improved by surface treatments, and fatigue stresses have been significantly reduced in aircraft and other applications by designing to avoid stress concentrations.
Hydraulic fracturing is a method used to create fractures that extend from a borehole into rock formations, which are typically maintained by a proppant, a material such as grains of sand or other material which prevent the fractures from closing. The method is informally called fracing or hydro-fracing.
━━ n., v. 破砕（する）; 割れ目; 【採鉱】断口; 【医】骨折（する）; 割る; 混乱させる; （名声などを)傷つける.
(′präp·iŋ ′ā·jənt) (petroleum engineering) Sand, gravel, or particles of other material (such as sintered bauxite or ceramic beads) suspended in drilling fluid during formation fracturing to keep (prop) open the cracks in the rock when the fluid is withdrawn. Also known as proppant.