Normal, double - helix DNA is spiral, like a loosely coiled spring.正常的双螺旋DNA是螺旋形的, 像一根松松地卷曲的弹簧.The spirally coiled central filament of a chromatid along which the chromomeres are aligned.染色线,染色''.'丝'....
The results showed that zeolite modified by hexadecyl trimethyl - ammonium bromide ( HTAB ) has higher adsorptive ability.研究结果表明:用十六烷基三甲基溴化铵 ( HTAB ) 改性沸石可增强吸附性能.The fatliquoring and the results show the leather after fa...
All year she has fluctuated between optimism and despair.全年当中她时而乐观,时而消沉.Her family had of late exceedingly fluctuated.她家里最近连起风波.His feelings fluctuated between excitement and fear.他的心情变化不定,有时激动,有时害怕....
Finally, the implementation and test the system are described detailedly.最后详细介绍了系统的具体实现和测试.EPA's approach to settlement changed radically during the early implementation of Superfund.在实施"特级储备"的初级阶段,环境保护署对和解的态度发生了根本的...
Topsy had an uncommon verbal memory, and committed with a fluency that greatly encouraged her instructress.托普西对文字的记忆力非常强, 上课时对答如流,使她的教师感到十分鼓舞.The instructress had called them to attention again.'女教练又叫他们立正啦....