英语长句分析

句意：中国官方（曾经）认为：国外技术对中国经济的现代化起着主要的作用。这种观点导致1978年进口增长率超过了50%。这对中国经济带来了过大的压力。

主语：Official recognition that foreign technology could play a major role in modernising the Chinese economy 。（主语的中心词是recognition，后面带了一个定语从句。）
谓语：had caused（这是过去完成时。）
宾语：imports to rise by more than 50 per cent in 1978 placing undue strain on the national economy（宾语的中心词是imports，不定式短语to rise by more than 50 per cent in 1978 是imports 的定语，而现在分词短语placing undue strain on the national economy是imports to rise by more than 50 per cent in 1978 的定语。）

Official recognition that foreign technology could play a major role in modernising the Chinese economy had caused imports to rise by more than 50 per cent in 1978 placing undue strain on the national economy.

官方认为,外国技术可能发挥重要作用,使中国经济现代化的进口增长超过50% 1978年,从而给国民经济带来了重压。

placing undue strain on the national economy

从而给国民经济带来了重压