Thee bluetape on the bulwark is to protect it from scratching during the trimming process.
蓝磁带上的堡垒，是为了保护它，从刮在修剪过程中。
2
The blue suits stretch the tape and call the division.
蓝色制服拉了圈警用带子，就打电话到部门。
3
Half of the soldiers stretched the tape and cut it as they pretended to cut the tape while the others emptied the beakers, filled it again with water and coloured it blue.