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concentrations
浓度
常用释义
英式发音
美式发音
基本释义
  • n. 关注点；[土壤]浓聚物（concentration 的复数）
考试频率
中考
考频：近四年出现1次
  • n. 集中; 专心
四级
考频：近五年出现5次
  • n. 专心; 专注 
  • n. 浓度
六级
考频：近五年出现5次
  • n. 专注
考研
考频：近六年出现2次
  • n. 专心; 专注 
  • n. 集中; 汇集
例句
  • 1·In heavy concentrations, ozone is irritating to the eyes, nose and throat.
    浓度极高时，臭氧对眼睛、鼻子和喉咙是有刺激的。
    来源: 《柯林斯英汉双解大词典》
  • 2·They can thrive in soil with high concentrations of metals that are toxic to most other plants.
    它们能在含有对大多数其他植物有毒的高浓度金属的土壤中茁壮成长。
  • 3·A number of neurotransmitters exert their effects by first increasing cyclic AMP concentrations in target neurons.
    许多神经递质首先通过增加靶神经元中的循环 AMP 浓度来发挥其作用。
  • 4·Seawater samples from the area where the seals died did contain unusually high concentrations of the toxic bacterium.
    来自海豹死亡海域的海水样本确实含有异常高浓度的有毒细菌。
  • 5·Tomorrow, we will dump a slightly larger amount, with the cumulative concentrations now trapping more and more heat from the sun.
    明天，我们会释放出更大的量，累积的浓度现在会吸收越来越多的来自太阳的热量。
  • 6·We can replace our concentrations here with, and so if you write equal to zero here, then we can write it as equilibrium right here.
    我们可以代替这里的浓度，如果你这里写等于零，那么我们可以在这把它写作平衡状态。
  • 7·Data from a later mission indicates significant concentrations of hydrogen and by inference water less than a meter underground at both poles.
    从后来的任务中得到的数据显示，在两极地下不到一米的地方有浓度相当高的氢，由此推断是水。
  • 8·Plankton generally thrive in areas of the ocean with sufficient concentrations of certain nitrogen compounds near the surface, where plankton live.
    浮游生物通常在海洋表面附近某些含氮化合物浓度足够高的区域大量繁殖，而海洋表面正是浮游生物生存的地方。
  • 9·The recent work has been made possible by new techniques of molecular biology that allow viral DNA to be detected at low concentrations in the environment.
    分子生物学的新技术使最近的工作成为可能，这种新技术能在环境中检测到低浓度的病毒 DNA。
  • 10·But Snyder et al point out that the caffeine concentrations needed to inhibit the production of phosphodiesterase in the brain are much higher than those that produce stimulation.
    但 Snyder 等人指出，抑制脑内磷酸二酯酶产生所需的咖啡因浓度要比产生刺激的咖啡因浓度高得多。
网络释义