Helis
abbr. hot electron layer ion source 熱電子層離子源
??? 情景例句
And, Marilyn, would you pour coffee, please.
Marilyn 請你倒一下咖啡好嗎？
Everyone is entitled to his own opinion.
每個人可以保留他的自己的意見。
Once, however, it failed to give the correct time.
然而有一次，它卻把時間報錯。