They tinkered with the engine…他们修了修发动机。They tinkered with the engine.他们修了修发动机。The Chemists have tinkered with heat and metal catalysts to refine their materials.化学家摆弄热和金属催化剂来提炼....
They tinkered with the engine…他们修了修发动机。The Chemists have tinkered with heat and metal catalysts to refine their materials.化学家摆弄热和金属催化剂来提炼.They tinkered with the engine.他们修了修发动机。They have tinkered with the geometry of the...