Effective antenna length
[电] 有效天线长度
🧩 词语组成解析
effective
[ɪ'fɛktɪv]
adj. 有效的;起作用的;实际的，实在的;给人深刻印象;
n. [军]现役兵额，有生力量，精兵;
ef出+fect做，制作 +ive形容词后缀 →做出来的 → 有效的
antenna
[æn'tɛnə]
n. [生] 触角，触须;感觉，直觉;天线;
an 等加在同辅音字母的词根前，表示\"一再\"等加强意 + t + enn =year,表示“年，一年” + a → n.天线
🗣️ 情景例句
You should save some money in case of urgent need.
你应该存点钱以备不时之需。
God defend me from my friends; form my enemy I can defend myself.
防友靠天，防敌靠己。
The Cutty Sark rolled from side to side and it became impossible to steer her.
船身左右摇晃，无法操纵。