01 / 15CrashCourse≈ approximate level B22:08–2:14 , “” .
02 / 15CrashCourse≈ approximate level B10:44–0:50
, -.
03 / 15CrashCourse≈ approximate level B12:50–2:58
, .
04 / 15TED-Ed≈ approximate level B22:56–3:07
- , ’s “ ,” , .
05 / 15TED-Ed≈ approximate level B20:19–0:32
, .
06 / 15TED-Ed≈ approximate level B24:41–4:54
, ’s , .
07 / 15BBC Ideas≈ approximate level C11:46–1:57
, , .
08 / 15CrashCourse≈ approximate level B21:13–1:22
’s - - .
09 / 15Sprouts≈ approximate level B20:00–0:10
, : .
10 / 15CrashCourse≈ approximate level C16:09–6:20
, “ , , , .
11 / 15CrashCourse≈ approximate level B21:54–2:01
— , , — - .
12 / 15WIRED≈ approximate level B19:17–9:25
.
13 / 15The New Yorker≈ approximate level B21:14–1:24
, .
14 / 15CNBC Make It≈ approximate level C12:18–2:27
's , , 's -, , .
15 / 15TED≈ approximate level C11:06–1:17
- , , ?