... back scattering factor 反向散射因数 back scissors反交叉 back screen [律]后掩护 ...
双语例句
1
Use scissors to trim hair around the ears and back of the neck into a straight line.
用剪刀将耳朵和脖子后面的头发剪成直线。
2
Please put the scissorsback where they were.
请把剪刀放回原处。
3
Back at the chrysanthemum bed she pulled out the little crisp shoots, trimmed off the leaves of each one with her scissors and laid it on a small orderly pile.