Reduction - metathesis method for preparation of strontium carbonate from celestite is developed.提出还原 - 复分解法制备碳酸锶的新工艺.Several kinds of ruthenium - catalyzed organic reactions were reviewed: hydrogenation, oxidation, isom...
From across the desk she gave him a witheringly imperious look.她从桌子对面扫了他一眼,目光咄咄逼人,凌利而专横。Guns fired witheringly at the railroad cars.枪一起对着列车车厢猛烈地、摧毁性地扫射.Katherine looked briefly and witheringly at Charley Lynch.凯瑟琳轻蔑地看了查利...