In many instances isocyanates react vigorously with water, alcohols, and amines.在许多情况下异氰酸酯同水, 醇和胺发生猛烈的反应.Both the alcohols and aldehydes are secondary products of the oxidation.醇和醛两者为氧化的次级产物.An alternative approach to al...
In many instances isocyanates react vigorously with water, alcohols, and amines.在许多情况下异氰酸酯同水, 醇和胺发生猛烈的反应.The carbene also reacts with alcohols.碳烯也可与醇反应.Both the alcohols and aldehydes are secondary products of the oxidat...
You can engage in croquet on the south lawn.你可以参加南边草坪上的槌球游戏。Press the lever until you hear the catch engage.压下挡杆，直到听到挡挂好。They never learned skills to engage the attention of the others.他们从未学过吸引他人注意的技巧。...
槽轮机构以结构简单、工作较为可靠等特点,在自动机械中被广泛采用.The Geneva mechanism was adopted by automatic mechanism because the simple structure and steady performance.飞槽轮在偏心轴上的两端位置可以相互调换,并通过胀紧套连接.The flywheel on the eccentric shaft can be exchange...
大多数氯氟甲烷存留在平流层下部.Most of the chlorofluoromethanes reside in the lower stratosphere.由于光化过程,在平流层与中层内产生了臭氧.Ozone is formed in the stratosphere and mesosphere by photochemical processes.极大值温度的高度称为平流层顶.The altitude of maximum ...