01 / 12Practical Engineering≈ approximate level B212:45–12:50 , .
02 / 12SmarterEveryDay≈ approximate level B211:08–11:11
; , .
03 / 12BBC Learning English≈ approximate level B22:09–2:14
.
04 / 12Practical Engineering≈ approximate level C16:03–6:10
, , , , .
05 / 12Tom Scott≈ approximate level C19:47–9:53
- , , .
06 / 12SmarterEveryDay≈ approximate level C112:20–12:23
.
07 / 12Practical Engineering≈ approximate level C16:18–6:25
, , , , .
08 / 12Practical Engineering≈ approximate level C113:50–13:56
, .
09 / 12Practical Engineering≈ approximate level C111:24–11:30
, .
10 / 12Practical Engineering≈ approximate level B212:38–12:46
, , % .
11 / 12SciShow≈ approximate level C14:24–4:42
, % , .
12 / 12MKBHD≈ approximate level C111:02–11:12
, ?