• 同时；然而，不过
• 同时,可是

1. at the same instant;

   "they spoke simultaneously"
   

2. overlapping in duration;

   "concurrently with the conference an exhibition of things associated with Rutherford was held"
   "going to school and holding a job at the same time"
   

1. at the same time

1. 同时：与此同时(Atthesametime),大将赵云怀抱刘备的幼子阿斗,在曹营中单骑纵横,毙敌无数,终于杀出重围. 此时,溃败到夏口的刘军与曹军仅一江之隔. 刘备明白,仅凭长江天险阻拦强大的曹军并非长久之计,曹操早晚会打过长江,届时百姓必将尽遭涂炭.

2. at the same time

2. 与此同时：与此同时(Atthesametime),仍在法国多尔登山谷继续工作(从事体力或脑力劳动,也泛指机器工具)的小组其他成员在遗址里发现了一间濒临崩塌的密室,并在里面找到了一个600多年前不可能存在的双焦透镜,最不可思议的是,

3. 同时,然而,不过：atthe moment此刻,目前 |atthesametime同时;然而,不过 |atthe sight of一看见......就

4. 但是,然而：at onetime 同时,曾经,从前曾 |atthesametime 但是,然而 |attimes 有时