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He can't maintain enough equilibrium to ride a bike.他騎自行車不能保持平衡.He can ride a bike now, but he couldn't a few weeks ago.他現(xiàn)在能騎自行車了, 但幾星期前他不會.Because I was old enough to ride a bike after I went to junior middle ...

騎自行車...

ride a bike的音標(biāo)：ride a bike的英式發(fā)音音標(biāo)為：[raid ? baik]ride a bike的美式發(fā)音音標(biāo)為：[ra?d e ba?k]...