A periodical talk is usually prearranged and requires some preparations.

Working to a prearranged plan, he rang the First Secretary and requested an appointment with the Ambassador.

按照预先安排的计划，他打电话给一等秘书，请求约见大使。

According to the prearrangement, male guests in the wedding banquet will be entertained by the bridegroom.

根据之前的安排, 婚宴上的男宾皆由男主人招待.

Rapakivi is a special rock in Precambrian.

环斑花岗岩是发育于前寒武纪的一种特殊岩石.

Precambrian time accounts for as much as eighty-five percent of all geological time.

前寒武纪占据了整个地质年代的百分之85.

The oldest rocks in the concession area belong to the Guyana and are of Precambrian age.

最古老的岩石层在圭亚那雨林,它们的年龄可以追述到前寒武纪.

They are controlled by shear fracture belt of epimetamorphic rock series of Precambrian Period.

主要赋存于前寒武纪浅变质岩系中,受剪切断裂带控制.

Precambrian time for as much as eighty-five percent of all geological time.

从前寒 武 世纪以来地球地面大部分被冰川所覆盖的任何地质年代.

Objective To research precancerous lesion diagnosis and early prevention and treatment of the cervix carcinoma.

目的探讨子宫颈癌的早期癌前病变,诊断要点及早期防治.

Objective To explore the practical means for identifying early carcinoma and precancerous lesions with magnifying endoscope.

目的探讨如何通过放大内镜观察到的大肠粘膜腺管开口类型发现早期大肠癌及癌前病变.

Active treatment for precancerous lesion of the gastric-remnant.

术后对残胃的癌前状态积极治疗.

Gastric precancerous lesions is the potential benign lesion of gastric carcinoma.

胃癌前期病变是指具有胃粘膜癌变潜在可能性的良性病变.

Objective To investigate the effects of Golden Hamster cheek Pouch precancerous lesion conversion blocked by microwave.

目的观察微波治疗在阻断金地鼠颊囊癌前病变恶化中的作用.

Both vaccines also appeared to prevent abnormal, precancerous cell growths found in the cervix, he says.

他说,两种疫苗还可预防子宫颈不正常的癌前细胞的增长.

Objectives To study the changes of precancerous lesions of stomach and their relationship with gastric cancer.

目的探讨胃癌前病变的转归以及与胃癌的关系.

He balanced precariously on the narrow window-ledge.

他在狭窄的窗台上很难保持平衡.

A bracelet was precariously placed on the rim of a well.

他把一篮鸡蛋很不安全地顶在头上.

Many of them orbit precariously close to their parent stars, so they scorching hot.

其中许多行星的轨道距其主恒星极近, 因此这些行星是炽热的.

She had grown so luminous even Dorothy, perched on her barrel, was precariously spellbound.

她变得那么容光焕发, 使得站在木桶上的多萝茜给危险地迷住了.

They live precariously on the income from a few small investment.

他们依靠些微投资中的收入,过著朝不保夕的生活.

The precariousness is further increased by self-experiences in the aforementioned marginal situation.

在上述边际情况下自身经验会更进一步增加这种不确定感.