Once-through
直流，直通
🧩 词语组成解析
through
[θru]
prep. 通过，穿过;经由;透过;凭借;
adv. 从头到尾;彻底;自始至终;
adj. （电话）接通;通话完毕;有洞的;直达的;
🗣️ 情景例句
Make a right at the stop sign.
就在停车再开标志那里向右拐。
Little children have the most fun playing make-believe.
儿童很喜欢幻想的游戏。
If you make a mistake on the form, just cross it out.
如果填表出了错，划掉即可。