half-hearted

adj.

粗心的；没精打采的，缺乏热情的；并非真心的；半心半意的

1. He did his work with half a heart.
   半心半意。

Half hearted
Crocodilian Cardiac Dynamics: A Half-Hearted Attempt
Half-Hearted Reform: Electoral Institutions and the Struggle for Democracy in Indonesia
Grappling with a half-hearted policy: The case of renewable energy and the environment in South Africa
Warning: Don't be half-hearted in your efforts to employ concurrent engineering
The ‘Personalisation’ of the European Elections: A Half-Hearted Attempt to Increase Turnout and Democratic Legitimacy?
How Stable Is Jordan? King Abdullah’s Half-hearted Reforms and the Challenge of the Arab Spring
Half-hearted protection: What does victim protection really mean for victims of trafficking in Europe?
A half-hearted defence of the CDEP scheme
The State in Retreat? Why has India Experienced Such Half‐hearted ‘Liberalisation’ in the 1980s?