Chen notes that, in theory, extracting seawater from a depth of several thousand meters is not a problem technologically, but due to excessive costs and little economic benefit, nobody has attempted it.
陳仁仲指出，理論上要抽取幾千公尺以下的海水來使用，技術上沒問題，但因成本太高、不合經濟效益，因此無人嘗試。