Since we are likely to place sizable orders regularly we hope that you will make some special concessions.
由于我方将定期大批量订购,希望贵方作出一些特殊的让步。
but that was precisely the idea adopted in some of the early instruments (seismometers) for recording earthquake waves.
但是早期记录地震波的仪器(测震仪)正是采用了这种思路。