TCs

英文解釋：

名詞 tc:

1. a crystalline metallic element not found in nature; occurs as one of the fission products of uranium
   同義詞：technetium, Tc, atomic number 43
2. a permanent council of the United Nations that commissions a country (or countries) to undertake the administration of a territory
   同義詞：Trusteeship Council, TC