Directivity gain
[計] 方向性增益
?? 詞語組成解析
[計] 指向性, 方向性
gain
[gein]
vt.& vi. 獲得;贏得;增加;（鐘、表）走快;
n. 利潤;[土木工程]腰槽;獲益;
vt. （在…上）開腰槽;吸引;（通過努力）到達;推進（一段距離）;
vi. 增進;增進健康;得益;（重量的）增加;
??? 情景例句
Aren't you going to the aerobics class this morning?
今天上午你不是去上有氧運動課嗎？
Don't you think we should add a sentence here like this?
難道你不覺得我們應該在這兒加上一句話？
One day, the man downstairs went to talk to the man. He went upstairs and knocked the door.
一天，樓下人去找樓上人談談。 他上樓敲門。