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colossal: adj. Of a size, extent, or degree that elicits awe or taxes belief; suggests a hugeness that elicits awe or taxes belief:
巨大的尺寸、范围或程度使人敬畏；无限的; 暗指能让人生畏或动摇信仰的巨大：
eg. The 46,000 ton Titanic was a colossal ship. 巨轮
He has a colossal nerve. 无比的胆量
enormous adj. suggests a marked excess beyond the norm in size, amount, or degree不仅表示“块头”和“数量”方面的“大”，而且可以表示程度方面的“极大”，并且具有反常(abnormality)的内涵。
eg. an enormous boulder 巨大的圆石;
enormous expenses 巨额费用
gigantic adj. refers to size likened to that of a giant:
指象巨人一样的大小尺寸：
eg. a gigantic redwood tree 大得惊人的红杉树;
a gigantic tower 像巨人一般的塔
tremendous adj. suggests awe-inspiring or fearsome size:
指大小让人生畏或令人感到可怕：
eg. a tremendous monument 100 feet high 一百英尺高的巨大纪念碑；
The wheal eats a tremendous meal. 鲸鱼一餐要吃很多。
vast adj. refers to greatness of extent, size, area, or scope
指范围、大小、地区或跨度的宽广
a vast plain 辽阔的平原
