求翻译：重点选取一些波动性较强、收益性高的能源期货、有色金属期货和股指期货。投资策略应以短线操作为主，包括：短线交易策略、日内波段交易策略、日内炒手交易策略、技术分析策略。是什么意思？

selected some of the fluctuation of a relatively strong, high-energy futures, and non-ferrous metals futures and stock futures. Investment strategies should be based on short-term actions, including: short-term trading strategy, trading policy band days, days to speculators trading policy, technical

Key selection of strong, income volatility and high energy futures, of non-ferrous metals futures and stock index futures. Investment strategy should be based on short-term actions, including short-term trading strategies, day fried hand band trading strategies, day trading strategies, technical ana

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