PG Machinist光学曲线磨床技师
Xiao PG肖培根
PG cellPG细胞;肺癌细胞PG
PG size编码器解像度
Security PG安全加值组
PG细胞PG cell
PG Rated皮克级别
SUW PG涡杆
pepsinogen PG胃蛋白酶原
SYMBOL for() SYMBOL fora film certified for viewing by anyone, but which contains scenes that may be unsuitable for children, for whom parental guidance is necessary PG级电影; 被认证为任何人都可以看的电影,但因影片有儿童不宜场景,所以儿童须有父母陪同才能观看