The main thing is to start off slowly and progress gradually.

最重要的是开始要缓慢，然后逐渐加快。

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Chronic lymphocytic leukemia and chronic myelogenous leukemia usually progress slowly compared to acute leukemias.

相对于急性白血病，慢性淋巴细胞白血病和慢性粒细胞性白血病通常进展缓慢。

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Worldwide efforts to confront tuberculosis (TB) are making progress, but too slowly, according to a report by the World Health Organisation (WHO).

世界范围内对抗结核病的努力已经取得进步，但还是太过缓慢，根据一份世界卫生组织的报告称。

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Progress comes slowly to New Orleans, but come it does.

NPR: Long Desired, Streetcar Returns to New Orleans

Remember when maps were 2D, topographical pictures on a piece of paper that you could slowly move a finger across to track your progress?

FORBES: Traffic App Waze Introduces Real-Time Map Changes ?

While chemical and electrical engineers continue to improve them, progress comes slowly.

FORBES: Why Hydrogen Cars Could Still Be The Future