n. 田;(作某種用途的)場地;(學(xué)習(xí)或研究的)領(lǐng)域;運(yùn)動(dòng)場;
vi. [棒球、板球等]擔(dān)任外場員,擔(dān)任守隊(duì)隊(duì)員;接守,接防;接,擲還(球);
adj. 實(shí)地的;[體育]1)。 在田賽場地進(jìn)行的2)。 田賽的;軍事]野戰(zhàn)的;在實(shí)地工作的;
vt. 保護(hù);把(農(nóng)作物等)曬在場上;[棒球、板球等]按(或截)(球);即席圓滿回答;
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.