Guard it as closely as you do your PIN code for the ATM.
就向取款机的个人身份识别号一样地严密保护它。
2
When the socket is used, and a pin contacts a power, the copper sheet and the plastic insulating part of the pin enter the guard frame, which can effectively prevent the accident of electric shock.
使用该插座，当插销接触到电源时。插销的铜片和塑料绝缘部分已进入防护框内。能有效地防止触电事故。
3
Soon after the match resumed, his opponent made a critical mistake: he dropped his guard. Instantly, the boy used his move to pin him.