相对于多媒体卡由7针连接，安全数码卡，是由9连接引脚。

Compared to the Multi Media card composed of 7 connection pins, the Secure Digital card is composed of 9 connection pins.

youdao

相对于多媒体卡由7针连接，安全数码卡，是由9连接引脚。

Compared to the Multi Media card composed of 7 connection pins, the Secure Digital card is composed of 9 connection pins.

youdao