Nervuration
脈序, 翅膀形成
??? 情景例句
to meet the rest of the troop at two o'clock at the museum.
我們得在兩點(diǎn)鐘到博物館與其他童子軍會(huì)合。
I think you probably know China has adopted a flexible policy in her foreign trade.
我想你也許已經(jīng)了解到中國(guó)在對(duì)外貿(mào)易中采取了靈活的政策。
If they knew how difficult it was to drill through the hard rock, they would lose heart.
如果他們知道了鉆透那堅(jiān)硬的巖石有多么困難，他們會(huì)喪失信心的。