到上个七月为止他教数学四年了。

He had taught maths for four years by last July.

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在玩具市场，编程教育的热潮主要集中于STEM（科学、技术、工程、数学四大领域的合称）类玩具。

Part of the buzz in the toy aisle specifically focuses on STEM (science, technology, engineering and math) toys.

youdao