1.
The bi4π counting method as a new fundamental method of activity measurement is introduced.
本文介绍了一种新的测量放射性活度的计数器及基础测量方法——双4π计数方法。
2.
Average radiant intensity is simply the total radiated power divided by 4π sterad.
辐射的平均强度简单地说是总的辐射功率被4π立体角除。
3.
MEASUREMENT OF TARGET SURFACE ROUGHNESS WITH 4π TURNING TECHNOLOGY OF AFM
用原子力显微镜4π旋转技术测量靶丸表面粗糙度
4.
two or four athletes respectively,
双人双桨，四人双桨，
5.
Duplex (pressure)gauge
双工[双针]压力表
6.
double-head arrow
双箭头(双头指针)
7.
double quotation marks ((""))
双引号((""))
8.
douBle deliciousness, douBle pleasantness
双重美味，双重愉悦
9.
binocular microscope
双目显微镜,双筒显微镜
10.
dual two trailing shoe brake
双向双从蹄式制动器
11.
double-action pump
双动泵，双作用(活塞)泵
12.
bidirectional flow
双向流动, 双向流(程)
13.
dual two leading shoe brake
双向双领蹄式制动器
14.
double bleaching with sodium chlorite and hydrogen peroxide
亚氯酸钠双氧水双漂法
15.
double-action disc harrow
(双列圆盘靶) 双功圆盘靶
16.
dizygotic twins
二卵双生，异卵双生
17.
double-sided plush
双面绒,双面长毛绒
18.
bifilar helix biperiodic electrostatic focusing
双螺线双周期静电聚焦