具体来看，2022年至2025年1-6月，天博智能研发费用分别为4298.56万元、5404.56万元、6739.13万元和3486.50万元，看似呈增长趋势，但研发费用率（研发费用占营业收入比例）从2022年的4.44%逐年下滑至2025年1-6月的3.79%。同期，同行业可比公司的研发费率均值分别为5.13%、5.51%、5.65%和5.39%，始终保持在5%以上且呈上升趋势，天博智能研发投入力度与行业发展趋势相悖。
Compare this with how Ada/SPARK handles contracts. In SPARK, contracts are verified statically by a formal proof engine using SMT solvers (CVC4/Z3). The toolchain proves, at compile time, that preconditions are always satisfied by all callers. If it can’t prove it, the code doesn’t pass review. There’s no “observe and continue” — you fix the proof or you don’t ship. C++ contracts are runtime checks with optional enforcement. SPARK contracts are compile-time proofs with mandatory satisfaction. These aren’t the same category of tool.
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