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反应势垒；反应阻挡
1、barrier cream───n.护肤脂；防护脂；n.护肤脂，防护脂
2、reaction───n.反应，感应；FanDong，复古；反作用
3、barrier───n. (Barrier)（法）巴里耶（人名）；vt.把……关入栅栏；n.障碍物，屏障；界线
4、placental barrier───[胚]胎盘屏障
5、vapor barrier───[机] 蒸汽屏蔽
6、unfailing reaction───经久不衰的反应
7、cationization reaction───阳离子化反应
8、natural reaction───自然反应
9、mixed reaction───[经] 意见不一；各种不同反应
1、fission barrier parameters for actinide nuclei were obtained by analysis and calculations of fission cross-sections and complete neutron reaction cross sections.───通过分析和计算锕系核裂变截面和全套中子反应截面获取了一组锕系核的裂变位垒参数。
2、The calculated results shows that because of the low energy barrier and high exothermicity, the reaction of CH3SS with xo could occur easily in the atmosphere.───计算结果表明单线态反应为主要反应通道，且由于该通道的反应能垒低、放热明显，说明CH3SS与XO在大气中比较容易进行。
3、Changes in the input voltage lower the barrier and increase current flow in transistors, just as adding an enzyme to a chemical reaction speeds it up.───改变输入电压能降低屏障并增加晶体管电流，正如加入酶使化学反应加速一样。