权威例句
Autoharp.AutoharpAutoharpMatthew J. TowMarc GunnJune Carter CashLuthierLuthierC. F. ZimmermanStart Planning Your Bluegrass Year!Trapeze-shaped wooden body with twenty steel strings and six bars across the middle of the instrument giving six different chords. S...Oscar Schmidt AutoharpGeotechnical engineering reconnaissance of the 2010 Haiti earthquake