英语语法分析

There are also 21 astronauts from other countries, including Hadfield, who is Canadian.

美国还有来自其他国家的21位宇航员。

"The first three weeks are about making the effort to just get your run or walk in," says Hadfield.

“头三个星期是要努力让你坚持来跑或者徒步，”Hadfield说。

"You have to think of hills within the context of the whole run," says Jenny Hadfield, coauthor of Marathoning for Mortals.

“你得将山坡纳入到你整个跑步计划中来，”Jenny Hadfield说，她是《人类马拉松》一书的合著者。