2017托福考试阅读高频词汇解析（二十二）_第3页

　　§ metallurgy

　　§ 冶金术

　　§ You might say, well what's the person who studied chemical metallurgy doing teaching chemistryhere? Well, after my Ph.D., MIT I came here as a postdoctoral fellow in 1977.

　　§ penetrate

　　§ pierce

　　§ 渗透, 穿透

　　§ Because water is the softest substance in the world, but yet it can penetrate the hardest rock or anything -- granite, you name it.

　　§ savannah

　　§ 大草原, 热带草原

　　§ Only 60 years ago, the land around Moyale was savannah with plenty of grass, big trees andelephants, lions and rhino.

　　§ roughly

　　§ approximately

　　§ 大约地

　　§ This could be estimated at 1000 litres of hydrogen for 330 grams of chlorophyll per day whereasfor example colza produces roughly only 1000 litres of oil per hectare . . .

　　§ profound

　　§ thoughtful

　　§ 意义深远的

　　§ This means profound change in nearly every important relationship we have —as familymembers, neighbors, citizens of nations and the world.

　　§ complexity

　　§ complication

　　§ 复杂性

　　§ At the top end of the complexity spectrum, you could end up with refinement cycles within refinement cycles, each with different iteration frequencies.

　　§ blacksmith

　　§ 铁匠

　　§ He was the only blacksmith for miles a round and since he did very good work, his shop wasfrequently crowded with neighbors and old friends and other shopkeepers from the village.

　　§ productive

　　§ prolific

　　§ 多产的, 丰富的

　　§ They need to do two things: invest in the productive capacity of agriculture and improve theoperation of food markets.

　　§ warrior

　　§ 勇士

　　§ Sammi one of these three means the sacred bird, also means warrior bold and passionateChristian wisdom, rich, intelligent mind and it is the perfect character.

　　§ symbolic

　　§ representative

　　§ 代表性的

　　§ And if anywhere along your schedule you have the opportunity, as a symbolic gesture of support, to stop in to those stations, thank those firefighters, we would greatly appreciate that.