(The size of something) is smaller than (the size of one thing) is usual for things of the same kind.
省略句式,省略了主句和比較從句的主語(yǔ).
than,連詞之后是省略主語(yǔ)后的謂語(yǔ)動(dòng)詞is,表語(yǔ)usual for the things of the same kind.
感覺(jué)上面,以size為例做主語(yǔ),有些不太恰當(dāng),或者過(guò)于具體.
smaller than is usuall for things of the same kind,就是個(gè)比較句型中主句的主語(yǔ),謂語(yǔ),從句的主語(yǔ)被省略掉了.主句的主語(yǔ),是某物; 從句的主語(yǔ)應(yīng)該是形式主語(yǔ)it,.
如果,我們說(shuō),This computer is smaller than it is ususal for comeputers.it 代表人們現(xiàn)有認(rèn)識(shí)到的某種物品的大小結(jié)構(gòu)特點(diǎn)的標(biāo)準(zhǔn).
我們可以用compact,這個(gè)詞來(lái)描寫this computer.