doubling

He is doubling the part of a teacher and a missioner.

他在一出戏里扮教师和传教士两个角色。

He is doubling the parts of a preacher and a teacher.

他扮牧师和教师两个角色。

In the play, Mary is playing the part of the dancer and doubling as the mother.

玛莉在中扮那名舞蹈员，中母亲。

there has been a doubling in the amount of gas consumed by electricity generators.

发电机耗油量已加。

When the deformable mirror is drived by the cosinoidal signal, the response equilibrium displacement is frequency doubling cosinoidal.

当变形镜由余弦电压驱动时,平衡位移响应为2频余弦信号;

In plants this is sometimes overcome by the doubling of the chromosome number, giving an allopolyploid.

在植物中，这种不育现象有时可因为染色体数目加而抵消，产生同源多体。

Fireresistant Hall device and SmCo rotor is used to design position and speed sensor, and the corresponding doubling circuit and decoding circuit is designed.

采用耐高温锁定型霍尔元件和钐钴永磁转子分别构成位置与速度传感器，并设计相应速度信号频电路与位置信号译码电路。