This bookcase is too unstable to hold so many books.

这书橱很不结实, 装不了这么多书。

He was the most unstable kind of fool I had ever seen.

他是我所遇见过的最反复无常的傻瓜。

The patient’s condition was unstable.

那患者的病情不稳定。

The operation pressure of debutanizer was unstable since a light hydrocarbon recovery unit had been put into use.

某轻烃回收装置自投用以来,脱丁烷塔操作压力一直不稳定。

But, there were extremely low efficiency of integration, unstable hereditation and expression in transgenic animals by the technique.

但是，这种方法存在基因整合效率低、外源基因不能在转基因动物体内稳定遗传及表达的问题。

The manifestation of subhealth mainly included unstable emotion and hypomnesia whose occurrence was correlative with bad life style and family factor.

亚健康的表现类型以情绪不稳及记忆力减退最多,其发生与生活不良习惯及家庭因素有关。

Thermokarst failures occur when permafrost—a layer of frozen soil in Earth's polar regions—thaws and becomes unstable, possibly releasing greenhouse gases into the atmosphere.

随着永久冻土带消溶和分崩离析，热喀斯特现象大量出现，埋藏于地下的（甲烷等）温室气体可能散发到大气中。

In fact, the MI patients had unstable angina, a high risk condition already established by pathological studies to bespecifically induced by intramyocardial platelet emboli.

事实上，心肌缺血患者有不稳定心绞痛，病理学研究已证实这种高危状态可由心肌内血小板栓子诱发。

The diolefins and alkenyl aromatics are very unstable components which can give gums by polymerization.In giving olefins and alky aromatics the hydrogenation improves the product quality.

二烯烃和烯基芳烃是非常不稳定的组分，可聚合产生凝胶。对于给定烯烃和烷基芳烃，氢化可以改善产品质量。

There is a coal layer on the clay of direct roof.This layers is unstable and easy tofall down after mining and enable the gas to gush out.

团溪锰矿的直接顶板粘土之上有一煤层，且不稳定，采后容易垮落，造成瓦斯涌出。