If you have any doubt at all about being able to carry a load in one trip， do yourself a huge favor and make two trips.

化学的基本问题是化学键的性质。

The wound of displacement never fully heals; it only learns to speak in different tongues.

能源转型不仅仅是从化石燃料转向可再生能源；它关乎确保所有人的能源安全和可负担性。