正戊醛是合成香料双氢茉莉酮酸甲酯的重要原料.N - amyl aldehyde is a main raw material in the synthesis of methyl dihydrojasmonate fragrance.2-戊基环戊烯酮再与丙二酸二甲酯缩合,脱羧得到二氢茉莉酮酸甲酯.Methyl dihydrojasmonate was synthesized from 2 pentyl 2 cyclopentanone ...
The distant rumbling of the guns mingles with our marching song.枪的深邃长声与我们行进歌混合.The crane made rumbling sound.吊车发出隆隆的响声.With a low-pitched rumbling noise, the propeller began to rotate.伴随着隆隆的低沉噪声，螺旋桨开始旋转起来。Lysenko gave a ...
They passed the dry bed of a rivulet.他们跨过了一道干涸的河床.The school is located near the rivulet.学校坐落在小河附近.I see you hold the edge of your skirt strid a rivulet.我看见你提起裙裾跨过小河.The ploughs crossed and recrossed the rivulet marks.耕犁...