The weather grew harsh, chilly and unpredictable.天气变得恶劣、寒冷且变化莫测。He makes unpredictable, arbitrary decisions.他做的决定难以预料, 主观武断.He is unpredictable, weeping one moment, laughing the next.他喜怒无常，一会儿哭，一会儿笑。Take waterproof cloth...
Sloping walls on the bulk of the building create an optical illusion.大楼主体的斜墙给人造成一种视错觉。The camera combines rugged reliability with unequalled optical performance and speed.这款相机既坚固耐用，又有超凡的光学性能和快门速度。These optical fibres may...
They also thanked the Native American Indians who lived in the area.他们也感谢住在当地的印第安土著人.I thanked my parents for all their self-sacrifice on my behalf.我感谢父母为我做出的所有自我牺牲。He thanked all who had a hand in his release.他向所有帮助自己获得...