沉吟不决[chén yín bù jué]
词典hesitate to do [doing] sth.
词典hesitate to act or choose one's course：沉吟不决。
词典inability to make up one's mind：沉吟不决。
沉吟不决[chén yín bù jué]
hesitate to do [doing] sth.; hesitate to act or choose one's course; inability to make up one's mind