《宋史·志·卷一》
管子好用便利，是排泄水的，不是玉制就不能坚固良好而保持长欠。
管之善利者，水所溲也，非玉则不能坚良以久。
The tube is easy to use and convenient for draining water; if it were not made of jade, it would not be strong enough to last.
<s>[INST] Translate the following Classical Chinese text into modern Chinese: 管之善利者，水所溲也，非玉则不能坚良以久。 [/INST] 管子好用便利，是排泄水的，不是玉制就不能坚固良好而保持长欠。</s>
Translate the following Classical Chinese text into modern Chinese: 管之善利者，水所溲也，非玉则不能坚良以久。
user
管子好用便利，是排泄水的，不是玉制就不能坚固良好而保持长欠。
assistant