作业帮英语厉害的朋友们,帮我分析一句话,里面包含什么从句,
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英语厉害的朋友们,帮我分析一句话,里面包含什么从句,
It has been found that certain bats emit squeaks and by receiving the echoes,they can locate and steer clear of obstacles------or locate flying insects on which they feed.This echo-location in bats is often compared with radar,the principle of which is similar.
It has been found that certain bats emit squeaks and by receiving the echoes,they can locate and steer clear of obstacles------or locate flying insects on which they feed.This echo-location in bats is often compared with radar,the principle of which is similar.
1.certain bats emit squeaks and by receiving the echoes,they can locate and steer clear of obstacles --- or locate flying insects on which they feed
主语从句：当然句首的it是形式主语,该主语从句（后面有括号的部分）是真正的主语.
翻译：（人们）已经发现（某些蝙蝠发出吱吱的短促叫声,而且通过接受回波,它们能够对障碍物进行定位和避离 -- 或者是对它们进食的飞行昆虫进行定位)
2.on which they feed
限制性定语从句：修饰先行词insects.
即：它们（指蝙蝠）用以进食的正在飞行的昆虫
3.the principle of which is similar
非限制性定语从句：which代指并修饰先行词radar.
即：雷达的原理（和蝙蝠的回波定位原理）是相似的
主语从句：当然句首的it是形式主语,该主语从句（后面有括号的部分）是真正的主语.
翻译：（人们）已经发现（某些蝙蝠发出吱吱的短促叫声,而且通过接受回波,它们能够对障碍物进行定位和避离 -- 或者是对它们进食的飞行昆虫进行定位)
2.on which they feed
限制性定语从句：修饰先行词insects.
即：它们（指蝙蝠）用以进食的正在飞行的昆虫
3.the principle of which is similar
非限制性定语从句：which代指并修饰先行词radar.
即：雷达的原理（和蝙蝠的回波定位原理）是相似的