∙ 1\. Age between 18-80 years,gender not limited; 2. The number of liver metastases is≥3.Besides the ablation lesions,there must be at least one measurable lesion(≥1cm),and the diameter of the ablation lesions is\<5cm; 3. Expected survival≥3 months; 4. ECOG performance status score of 0-1; 5. Within 14 days before the first dose,laboratory tests indicate adequate organ function:

∙ a) Hematology:WBC≥3.0×10\^9/L;ANC≥1.5×10\^9/L;PLT≥75×10\^9/L;HGB≥90 g/L b) Liver function:Child-Pugh score≤7,AST≤5.0×ULN;ALT≤5.0×ULN;TBIL≤1.5×ULN c) Renal function:Cr≤1.5×ULN or CrCl≥60 mL/min d) Coagulation function:INR≤1.5×ULN(for patients on anticoagulant therapy,≤3×ULN,anticoagulants must be discontinued one week before ablation);APTT≤1.5×ULN ii. Additional eligibility criteria for each cohort:

• Colorectal Cancer：

• a) Clinically or pathologically confirmed colorectal cancer with liver metastases that are unresectable, or the patient is intolerant to or refuses surgery; b) Patients who have failed standard second-line drug therapy.

• Triple-negative breast cancer :

‣ Clinically or pathologically confirmed triple-negative breast cancer(triple-negative defined as\<1% nuclear staining for ER and PR expression and HER2 negative);

⁃ Patients who have failed standard second-line drug therapy(including those who have failed PD-1 monoclonal antibody therapy, with progression within six months of adjuvant or neoadjuvant therapy considered as first-line therapy failure).

• Melanoma :

‣ Clinically or pathologically confirmed melanoma liver metastasis, with inoperable or intolerable liver lesions or refusal of surgical resection;

⁃ Patients who have failed standard first-line drug therapy.