2. Scleractinian corals thrive in nutrient-poor (oligotrophic) tropical and subtropical shallow seawater environments around the world. This is due in large part to symbiotic relationships between the host coral animal, unicellular, photosynthetic dinoflagellates...
379. I can hardly pardon his discarding the hardware and cardboard in the harbour. 我简直不能原谅他在港口丢弃五金和硬纸板。 380. The guard guards the guarantee in the garden regardless of the hazard. 卫兵不顾危险看守着花园里的...