We must study dialectical materialism so that we can use it to guide our work.

　　我們要認真學習辯證唯物論，用以指導實踐。

　　Idealism is opposite to materialism.

　　唯心論和唯物論是對立的。

　　The body's metabolism is slowed down by extreme cold.

　　嚴寒可以使身體新陳代謝的速度下降。

　　The big difference between "drought-tolerant" plants and these tough plants: metabolism.

　　“耐旱”植物與這些頑強植物之間一大區(qū)別是:新陳代謝。

　　Basal metabolism is much lower for creatures in cold water.

　　冷水中生物的基礎代謝速度要低很多。