阪上走丸如丸走坂bǎn shàng zǒu wánballs roll rapidly down a slope—a rapidly developing situation; do sth most easily; ride the crest of fortune
? 戰(zhàn)爭爆發(fā)后，形勢急轉(zhuǎn)直下，猶如～。After the war broke out,the situation took a sudden turn and developed rapidly like a ball rolling down a slope. 阪上走丸bǎn shàn zǒu wán形容形勢發(fā)展很快，如同斜坡上滾彈丸一樣。the situation goes faster and faster, just like rolling a ball down the slope |