也好: that's fine, may as well, (reduplicated) regardless of whether... or....
杠铃: barbell...
养老: to provide for the elderly (family members), to enjoy a life in retirement...
晚期: later period, end stage, terminal...
致力: to work for, to devote one's efforts to...
中级: middle level (in a hierarchy)...
动物园: zoo...
乘: to ride, to mount, to make use of, to avail oneself of, to take advantage of, to multiply (math.), Buddhist sect or creed...
担: shoulder; take on; undertake...
课题: task, problem, issue...