natural occurrence

Spontaneous abortion at earlier stages of pregnancy is called miscarriage.

流产可自然发生,称自然流产。

of or relating to autogenesis.

属于或关于自然发生说。

a believer in abiogenesis.

一个自然发生的信徒。

Your swing will be on“ automatic pilot.

你的挥拍将在”自动装置”上很自然发生.

The pig is the only animal in which hog cholera is known to occur naturally.

猪是已知自然发生猪瘟的唯一动物。

natural circulation steam generator

自然循环蒸汽发生器

cause to grow and differentiate in ways conforming to its natural development.

随着自然的生长而发展。

nativeness by virtue or originating or occurring naturally (as in a particular place).

自然起源或发生于某地。

Generation and Development of Naturalism in Japan as a Necessity;

自然主义在日本产生与发展的必然性

The Relationship Between the Developments of Natural Science and Productivity as Viewed from the Development of History;

从自然科学的发展看自然科学与生产力的关系

Harmonious Development of Human Being and Nature Relying on the Value Guidance of Natural Ecosystem

人与自然界的和谐发展及自然生态价值引导

happening or arising without apparent external cause.

自然产生的不是由显然的外力诱发或产生的。

a natural pearl; natural deposits of potassium salts; natural resources; natural fibers; natural blonde hair; the natural color of raw silk.

天然珍珠；钾盐的自然沉淀物；自然资源；天然纤维；天生的金发；生丝的天然色彩。

Everything must be spontaneous and rise spontaneously from an artistic temperament.

一切必须自然而然发生出来，由一种艺术的脾性中自然而然发生出来。

Floods occur more often than any other natural disaster.

洪灾比其他的自然灾害更容易发生。

Such instances occur in nature.

这种情形，在自然界确有发生。

The inflammation may subside sponxaneously if infection does not develop.

如果不发生感染，炎症可自然消退。

The occurrence of flood and drought disaster (FDD) is not a simple natural accident.

水旱灾害的发生并非单纯的自然事件。