ch(newItem => {
        const oldItem = this.menuStringsOldEn.find(o => o.key === newItem.key && o.scope === newItem.scope);
        if (!oldItem) {
          this.diffItems.push({
            key: newItem.key,
            scope: newItem.scope,
            color: 'green',
            type: 'added',
            newValue: newItem.value
          });
        }
      });

      // 删减
      this.menuStringsOldEn.forEach(oldItem => {
        const newItem = this.menuStringsNewEn.find(n => n.key === oldItem.ke