Calcium carbonate occurs in the allomorphs calcite and aragonite.同质异晶的方解石和文石中含有碳酸钙.The chemical composition of the melo shell is calcite and aragonite.美乐贝的化学成分是方解石和文石.Aragonite and magnesium calcite are more soluble than...
他侦察敌人兵力薄弱的位置，对其要塞不予理睬。He probes the enemy's weak positions, ignoring his strongholds.许多人认为承认有压力是意志薄弱的表现。Many people felt that admitting to stress was a sign of weakness.我们必须找敌人最薄弱的部队攻击.We must pick out the enemy...
Mauna Loa awoke from a 25 year silence in July 1975, filling its summit - pit crater with lava.莫纳罗亚火山在1975年7月又从沉睡了25年的状态下苏醒过来了, 山顶上的火山口充满了熔岩.The numerical model of the linear optical amplifier ( LOA ) is built based on t...
Again there was that moment of splintered sapphires before the lids, dropping like scales, extinguished it.她眼眶中又闪烁出蓝宝石的光彩,接着眼睑象鱼鳞般地垂落下来, 双目又黯然失色了.She also sported a somewhat gawdy gold watch set with diamonds and sapphir...