#交易对 "Trading pairs" are like the "vegetable and egg" combinations in a market: different trading pairs determine the base currency and quote currency for buying and selling. For example, in the common BTC/USDT pair, USDT acts like a widely used unit of account in the market; as long as you have USDT, you can buy Bitcoin; conversely, if you want to sell Bitcoin, you can exchange it for USDT. Respecting the depth and liquidity of each trading pair is like selecting fresh vegetables in the market to ensure reasonable prices for transactions. When choosing an exchange, it is recommended to first check the trading volume of the trading pair to ensure order execution speed and slippage risk.