occur 高考四级六级

Surgery is the only choice of treatment if aspiration pneumonia, mediastinitis or other infections occur.

一旦病患出现感染症状时，手术治疗是唯一的选择。

Pyrite is more abundant and cobaltiferous and occurs in heavy patches in the sulfide mass.

黄铁矿很多，并且含钴，在硫化物块体中成稠密的斑块。

Who was at the helm when the collision occurred?

当碰撞发生时,谁在掌舵?

It occurred to him to tell the colonel of the problem.

他想起要告诉上校那个问题。

If urethral obstruction occurs, congenital megaurethra is lethal without patent urachus or rectoesical fistula.

如果存在尿道梗阻，先天性巨尿道即便没有脐尿或直肠膀胱瘘是致死性的。

Rapid deconditioning of the circulatory system can occur as a result of bed rest.

由于卧床，循环系统适应功能迅速下降。

The usual bipyramid-shaped parasporal bodies occur in Lepidoptera-active strains.

一般双金字塔形伴胞体形成于鳞翅目活性株。

Police said that the blast occurred at 9 a.m.

警方说这次爆炸发生在上午九点。

I hope no accident has occurred to him.

我希望他没出什么事。

The word “gratitude” did not occur in his words.

“感激”两字在他的话中是见不到的。

Rubral tremor is a rare movement disorder that occurs typically with midbrain damage.

摘要红核颤抖症是一种少见的运动疾患，它的发生通常和中脑的病变有关。

In addition, leukemoid reaction occurred and acted as indicator of recurrence.

此外，此病例伴有白血病样反应作为肿瘤复发的标。

Open lesion occur in early stage and are called spina bifida aperta or myelomeningocele.

开放性脊柱裂发生在胚胎发育的早期，又叫脊髓脊膜膨出。

When melasma occurs, melanocytes in certain areas overproduce melanin.

当发生黄褐斑，黑色素细胞在某些领域产生过量黑色素。

In postzygotic isolating mechanisms mating occur, but the resulting hybrid organism is inviable or sterile.

在合子后隔离机制中，匹配以进行，但或不产生杂种或杂种不育。

Didn't it occur to you to close the window?

难道你没有想到去关窗户吗?

The child's birth occured at 2 a. m.

这孩子凌晨两点出生。

A new outbreak of smallpox occurred in 1928.

1928 年爆发了新一轮的天花。

It occurred on the morning of the fifteenth.

事情发生在15号的上午。

In addition .there occurred difference in the structure of cotyledonary haustrum and other storages.

此外在子叶吸器的结构和其它贮藏物等方面存在差异。