单萜类化合物是植物挥发油的主要成份.The monoterpenoids are dominant components in the " volatile oils " of plant species.目的: 研究腺点金丝桃挥发油成分及相对含量.AIM : To study the constituents of Hypericum Scabraum. its percentage composition.方法: 采用水蒸气蒸馏法从...
The secret to happiness is to keep setting yourself new challenges.幸福的秘诀就是要不停地给自己设定新的挑战。Dara challenges our stereotypical ideas about gender and femininity.达拉对我们老一套的性别和女性特质观念提出了异议。Offe also challenges the postulate of an...
With its own fleet of trucks, the company delivers most orders overnight...这个公司拥有自己的货车车队，大多数订购货品可以隔日送到。Our lumbermen used heavy - duty trucks for transporting logs.我们的伐木工人使用重型卡车运送木料.Cars, trucks and buses produce exhaust...
Lowered sea levels exposed the shallow continental shelf beneath the Bering Sea.海平面下降使白令海底部的浅层大陆架暴露出来。How do people define the continental shelf?人们怎么确定陆架的范围的?The water above the continental shelf is moved by the tides an...
The reformer and ideologist Zheng Guanying was the exponential.郑观应是这一思想的积极倡导者.The exponential algorithm in terms of Cauchy stresses within the finite deformation elastoplasticity is submitted.本文基于柯西应力来表示屈服准则,给出了以柯西应力表示的有...