她用彩色的珠子串成了一条手链。

She strung colorful ___beads together to make a bracelet.

她的脸颊上挂着一滴泪珠。

A ___bead of tears hung on her cheek.

他调整了枪上的准星，瞄准了远处的靶子。

He adjusted the ___bead on his rifle to aim at the distant target.