试题题干
Translate the following sentence into Chinese.
These biological clocks, as they are called, usually are not quite exact in measuring time.
参考答案
试题解析
考点：biological clocks生物钟；quite exact十分精确；in measuring time在计量时间时。
句子结构：主句为These biological clocks are not quite exact，as they are called为插入语。