She had a wonderful clear skin with an attractive sprinkling of freckles.她光滑的皮肤上有几处可爱的小雀斑.His face slightly marked with the freckles.他脸上稍有一些雀斑.When she lies in the sun, her face gets covered in freckles.她躺在阳光下时, 脸上布满了斑点....
RGD is composed of three amino acids, arginine ( Arg ), glycine ( Gly ) and aspartic acid ( Asp ).RGD是 由精氨酸 ( Arg ) 、 甘氨酸 ( Gly ) 、天冬氨酸 ( Asp ) 三个氨基酸组成的序列肽, 是近几年来发现的具有生物活性的短肽序列之一.See how the ASP file will be returned fro...