《史记·七十列传·范雎蔡泽列传》
这是所谓的能伸而不能屈、能进而不能退。
此所谓信而不能诎，往而不能返者也。
This is the so-called being able to stretch but not bend, being able to advance but not retreat.
<s>[INST] Convert the following English text into Classical Chinese: This is the so-called being able to stretch but not bend, being able to advance but not retreat. [/INST] 此所谓信而不能诎，往而不能返者也。</s>
Convert the following English text into Classical Chinese: This is the so-called being able to stretch but not bend, being able to advance but not retreat.
user
此所谓信而不能诎，往而不能返者也。
assistant