It is now known that an atom has a positively charged nucleus that makes up more than 99.9% of the atom's mass but only about 10-14 (less than a trillionth)of its volume. The nucleus is composed of positively charged protons and electrically neutral neutrons, each about 2,000 times as massive as an electron.

原子的中心是原子核,带正电,其质量约为整个原子的99.9%,但其体积只占原子体积的10-14。原子中核的正电与质子的负电正好相等,原子呈电中性,质量为电子的2,000倍。

属类：化学及生命科学-化学-

In the ″underexcited″ mode, the condenser acts electrically like an inductor on the system.

在“欠励磁”方式下,调相机在电气上作用就像是系统中的一个电感器。

属类：工程技术-电力英语-

There are numerous other electrically operated devices used on various cars, including the radio, a seat warmer to warm the seat before the car heater Brings the car interior up to a comfortable temperature.

在各种汽车上还有许多其它的电气装置,包括收音机、电热器、电动门锁、后窗防雾器、旅行车后窗雨刷、挡风玻璃雨刷、电眼等等。在汽车加热器给车内加至舒适的温度之前,电热器可先给座椅加温。

属类：工程技术-汽车-

In this test the motor power is indicated on a wattmeter but the major part is backed off electrically

在这项实验中,马达功率指示在瓦特表上,但是其主要部分被电补偿。

属类：综合句库--

This cri du coeur acted electrically on her and she immediately warmed to him

这两声热情的呼唤,像一道电流,温暖地灌满了吴少奶奶的心曲

属类：综合句库--

At these levels carbon does not precipitate like oxygen, nor is it electrically active

这些浓度下碳既不象氧一样沉淀,也不呈电活性。

属类：综合句库--

The vibrations are amplified electrically and can be heard through loudspeakers in the operating room

这种震动通过电流放大后,就可以从手术室的扩音器中收听到。

属类：综合句库--

An electrically operated device used for massage.

振动用来传信的电动设备

属类：综合句库--

Any of three electrically neutral subatomic particles in the lepton family.

中微子轻微子家族中三种电中性亚原子粒子中的任何一种

属类：综合句库--

Neutrons, being electrically neutral particles, do not produce ionization or excitation directly in their passage through matter

中子是中性不带电的粒子,当它通过物体时并不直接产生电离或激发作用。

属类：综合句库--