L-
[医][=a compound structurally related to l-glyceraldehyde]（化学前缀）左型（与d-相对构型）, 碳水化合物中表示具有与l-甘油醛同样的构型者为l-构型族
🗣️ 情景例句
Let's give him our presents--now.
现在把我们的礼物送给爷爷吧。
At bedtime, I take off my clothes and put on my pajamas.
在上床时间，我脱掉衣服并且穿上我的睡衣。
This race, which went on for exactly four exactly four months, was the last of its kind.
这场比赛持续了整整4个月，是这类比赛中的最后一次，