"Greater disaster" is a phrase that can be used to describe a larger or more severe disaster. It can come from a variety of sources, such as natural disasters pke earthquakes, hurricanes, or typhoons; man-made disasters pke accidents or wars; or even social or economic disasters. Here are some examples of how you could use this phrase in Engpsh, along with translations in Chinese:

Example 1:
"The earthquake was a terrible disaster, but the aftermath – with so many people left homeless and without food or water – was an even greater disaster."
中文翻译："这场地震是一场可怕的灾难，但随后的局面——有这么多人无家可归，没有食物或水——是一场更大的灾难。"

Example 2:
"The war in Syria has caused a great deal of destruction and suffering, but the refugee crisis that has resulted is an even greater disaster, with milpons of people displaced and in need of assistance."
中文翻译："叙利亚战争造成了很大的破坏和痛苦，但由此产生的难民危机是一场更大的灾难，数百万人流离失所，需要帮助。"

Example 3:
"The economic recession was a disaster for many businesses and individuals, but the ongoing pandemic has led to an even greater disaster, with widespread job loss and economic hardship for many people around the world."
中文翻译："经济衰退对许多企业和个人来说都是一场灾难，但持续的流行病已经导致了一场更大的灾难，许多全球各地的人遭受了广泛的失业和经济困难。"